®

& Tunneling & Underground tucThe Official Publication of UCA of SME www.TUCmagazine.com Volume 15 N0. 2 June 2021

Design for intersecting

////////// Hybrid metro stations RETC returns to in-person meeting /////

RETCShowGuide Special Editorial Supplement from the publisher of Inside!

™ 21-04-08_013_ID21111_eAz_LosAngeles_TUC_210x283_RZgp

METRO LOS ANGELES, USA SUCCESS STORY IN CALIFORNIA WITH 10 TBMS 120 million passengers are travelling through Los Angeles every year. In the past 15 years a total of 10 EPB Shields have been built for more than 35 km of new metro lines. Herrenknecht guarantees the local support with their office in Sumner, WA. herrenknecht.com/MetroLA

Client: Los Angeles Metropolitan Transportation Authority Customer: Purple Line Section 3 – Frontier-Kemper Constructors, Inc. / Tutor Perini JV Purple Line Section 2 – Frontier-Kemper Constructors, Inc. Purple Line Section 1 – Skanska / Traylor / J.F. Shea JV Regional Connector Transit Corridor - Regional Connector Constructors (Skanska / Traylor JV) Crenshaw/LAX Transit Corridor – Walsh / Shea Corridor Constructors Gold Line Eastside Extension – Traylor Bros., Inc.

21-04-08_013_ID21111_eAz_LosAngeles_TUC_210x283_RZgp.indd 1 08.04.21 13:15 tuc& June Contents

Departments Cover Story 2 Chairman’s column In This Issue The city of Charleston’s Spring/Fishburne US17 Drainage Improvements Project is a five-phase program designed 4 to alleviate flooding in two drainage basins covering Underground approximately 202 ha (500 acres), or about 20 percent construction news of the Charleston peninsula. This project has several objectives: to improve the mobility, efficiency, emergency preparedness and community livability; and, most importantly, to alleviate many of the flooding problems by 28 reinvesting in the infrastructure. See the article on page UCA of SME News 16.

34 demand forecast Feature Articles

36 16 Classifieds Design and construction considerations for intersecting 37 tunnels — Charleston, SC RETC ShowGuide Steve Kirk, Michael Miglioretti, Kyle White, Lindsey Schneider, Jeffrey P. Kolzow

22 Hybrid metro station for mitigation of construction disturbance Oliver Martin

28 UCA returns to in-person meetings with RETC in Las Vegas, NV Margo Ellis

tucmagazine.com

AN OFFICIAL PUBLICATION OF UCA OF SME | WWW.SMENET.ORG | VOLUME 15 NO. 2 | JUNE 2021

Copyright 2021 by the Society for , Metallurgy and Exploration, Inc. All rights reserved. TUNNELING & UNDERGROUND CON- STRUCTION (ISSN 0026–5187) is published quarterly by the Society for Mining, Metallurgy, and Exploration, Inc., at 12999 E. Adam Aircraft Special editorial section Circle, Englewood, CO 80112-4167. Phone 1-800-763-3132 or 303-973-9550. Fax: 303-973-3845 or e-mail: [email protected]. Website: www. from the publisher of smenet.org. POSTMASTER: Send changes of address to TUNNELING & , 12999 E. Adam Aircraft Circle, Englewood, CO 80112-4167. Article copies and back issues available on microfilm or microfiche from Linda Hall Library in Kansas City, Mo. Printed by Publication Printers.

Reproduction: More than one photocopy of an item from SME may be made for internal use, provided fees are paid directly to the Copyright Clearance Center, 27 Congress St., Salem, MA 01970, USA. Phone 978-750-8400, fax 978-750-4470. Any other form of reproduction requires special permission from, and may be subject to fees by SME. SME is not responsible for any statements made or opinions expressed in its publications. ™ Member subscription rate included in dues. Tunneling & Underground Construction June 2021 1 tuc& Chairman’s Column

Looking back and looking ahead Editorial Staff Editor as term comes to an close William Gleason [email protected] his is my last column in this and for the UCA. This is something magazine as the Chair of the I have seen help my own career Associate Editor TUCA Executive Committee, tremendously, so encouraging Margo Ellis so it is somewhat inevitable for this participation is a particular passion [email protected] column to have a look back and look of mine. We have worked as a group forward. As the Chair of UCA, you at UCA to expand the number Production Graphic Artist take on the role of a steward, building of volunteers and there are many Ted Robertson on the achievements and leadership ongoing and new opportunities, such [email protected] of those that have gone before and as: trying to push forward some key Business Staff objectives into the future. I hope • An increase in the number and Media Manager to have left some fertile ground on quality of guideline publications Advertising which future leadership can continue (e.g., we now have several in the Gary Garvey to build. pipeline — risk management, [email protected] Looking back, I said this in my TBM selection, alternative first column two years ago: delivery, backfill grouting and Phone +1-800-763-3132 or +1-303-973-4200 In addition to continuing the others). Fax +1-303-973-3845 great work of the UCA, I have three • We have created a website areas of focus for my two-year tenure and expanded the Down for Internet www.smenet.org in the chair: That initiative to engage young members and students, bringing Society for Mining, Metallurgy, 1. A focus on listening to what new blood into the industry. and Exploration, Inc. Officers the industry needs and wants • We have expanded our outreach President from the UCA and setting out a to colleges and even high schools, clear pathway of action items to encouraging presentations William Edgerton achieve those goals. and preparing materials for 2. A focus on getting more presenters. President-Elect volunteers engaged in UCA • We have encouraged and further Ronald Parratt activities so we can achieve empowered the Young Members our goals in a reasonable and and Women in Tunneling groups, Past President practical timeframe. with conferences and other Robert Schafer 3. Provide clear and transparent events for networking and feedback to the industry about advancement. Representation Executive Director what the UCA is doing on behalf of UCA at the newly formed David L. Kanagy of the members. SME Inclusion and Diversity committee will drive our passion After multiple member to increase the number and Underground Construction engagement surveys and an industry influence of these important Association of SME leadership survey ahead of the groups for the future of our Executive Committee strategic planning exercise, it appears industry. Robert Goodfellow (Chair), Mike Rispin (Vice that we have achieved success for the • We have continued our contact Chair), Michael F. Roach (Past Chair), Mike first objective. This regular column with and education of elected Bruen, Leon J. Jacobs, Shane Yanagisawa, has been my attempt to meet the officials and are creating a “top Erika Moonin, Mike A. Mooney, Pamela S. goals of the third objective. I have underground projects” list to Moran, Mark Johnson, Matthew D. Preedy, Jon always tried to be clear on the inner enhance these education efforts Klug, Edward Dowey, Tony O’Donnell, Robert workings and developing news from ahead of anticipated federal A. Robinson, Grover Vargas, Sarah Wilson, the UCA initiatives and report infrastructure investment. Paul C. Schmall, and Michael Vitale where you, as members, can get more • We have created a dozen new involved. committees with more than 100 Engaging more volunteers in new UCA volunteers by forming objective two provides so many benefits both for the individuals (continued on page 12)

2 june 2021 Tunneling & Underground Construction ALWAYS

ADVANCING www.terratec.co

BANGKOK METRO Bangkok’s Mass network is quickly expanding to meet the needs of this growing Asian Mega-City. For the 3.3km Orange Line Project, TERRATEC has delivered a complete tunnelling solution to contractor, Italian-Thai Development PCL. Having the final breakthrough completed a full month ahead of schedule, TERRATEC’s continuing success is a result of robust custom-made TBM designs, a readily available stock of TBM spares and consumables, and a highly-skilled team offering specialised TBM support and prompt onsite assistance throughout tunnelling operations.

TUNNELLING SOLUTIONS METRO

Q2-2021-Bangkok Metro-TU&C.indd 1 4/27/2021 4:39:32 PM ® tuc& NEWSNEWSNEWS

Tunnel advocate confirmed to No. 2 spot in Department of Transportation he U.S. Senate confirmed the long-delayed Gateway rail project Transportation Trades Department, Polly Trottenberg, by a to alleviate congestion between AFL-CIO. Tvote of 82-15, to the No. New York and New Jersey, as Trottenberg served on Biden’s 2 spot at the U.S. Transportation her focus on clean transportation transition team, worked in the Department. Trottenberg is a New technologies and making safer Obama-era Transportation York Policy veteran who will be for multimodal users, like cyclists and Department as assistant secretary and deputy to Secretary Pete Buttigieg. pedestrians. under secretary for policy, and spent She will bring more than 30 years Trottenberg’s most recent post 12 years working on legislation as a of experience to helping President was New York Mayor Bill de Blasio’s Senate aide for Democrats including Joe Biden sell his $2.25 trillion Department of Transportation Charles Schumer (NY), the current infrastructure package. commissioner. She has promised majority leader. Bloomberg Government to seek bipartisan solutions for the Schumer said on the Senate reported that Biden’s $2 trillion nation’s transportation needs. floor that he talked with Trottenberg infrastructure plan faces pushback “Throughout my career, I “regularly” about Gateway. During from Republicans and corporations always valued the ability to work her confirmation hearing, Trottenberg opposed to the tax increases proposed with colleagues across the aisle,” agreed to prioritize the rail and to pay for the plan. Trottenberg, she said at her nomination hearing tunnel project, calling it a “project of whose nomination was opposed by 15 on March 3. national significance.” Republicans, drew criticism over her “Her understanding of The Biden infrastructure package efforts in New York City to regulate transportation issues will help would double transit spending, rideshare companies such as Uber the administration work to get according to the White House, Technologies Inc. and Lyft Inc. a package across the finish line, providing $85 billion to modernize Democrats lauded her support of said Greg Regan, president of the public transportation. n Tunnel linking Northern Ireland and Scotland proposed igh Speed Rail Group (HSRG) of Northern Ireland post-Brexit.” the Scottish parliament and that there a group of rail industry experts Jim Steer, an HSRG board is a “feasible path to its funding from Hhas created a proposal for a member, said, “There is an urgent the UK Exchequer that does not tunnel under the Irish Sea that would need for both new and improved adversely impact on other transport link Northern Ireland to Scotland and transport links between the four funding.” create better connectivity between the nations of the , A government spokesperson four constituent parts of the United which have been systematically said, “We have asked Sir Peter Kingdom. neglected for too long. Hendy to make recommendations The Guardian reported that the “Cross-border travel markets on how to improve transport submission from HSRG is expected for rail were growing strongly over connectivity between Scotland, Wales, to be reviewed by Sir Peter Hendy, the period to 2019. Travel generates Northern Ireland and . His who is expected to publish his interim economic value, but the opportunity recommendations will be published report within weeks. for further economic stimulus from in due course.” The proposed tunnel would link this source will be lost if transport The prime minister first suggested the towns of Stranraer and Larne, network capacity constraints are not connecting Stranraer in Scotland to which are 50 km (31 miles) apart addressed. Larne in Northern Ireland by bridge but a preferred route for the tunnel, “Building on the transformative three years ago, an idea that was based on 120-year-old research by impact of HS2, HSRG are calling widely derided by engineers. the Victorian engineer James Barton, for these cross-border rail links to Experts raised concerns about would be diverted to avoid Beaufort’s be addressed as a matter of urgency, the practicality of constructing a Dyke, a 305-m (1,000-ft) deep safeguarding the strength of the bridge across the stormy stretch of in the Irish Sea. whole of the UK economy in the water, which is more than 305-m According to the HSRG, the years ahead.” (1,000-ft) deep in places, and said tunnel would bind Northern Ireland The pitch submitted to the review would require dozens of support closer to Great Britain and would claims the proposal has the backing towers at heights “never achieved “address problems in economic status of the Northern Ireland assembly and anywhere in the world.” n

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Gateway project will be a priority for the Biden administration .S. Transportation Secretary who in 2018 threatened to shut order to get there,” Buttigieg said. The Pete Buttigieg told lawmakers down the government if a spending process involves reviewing anything Uthat the Gateway rail tunnel bill directed federal funding for the that might have changed since the linking New York and New Jersey tunnel. Gateway was ineligible for draft was issued, and coordinating is of national significance and as federal taxpayer money, the Trump with other federal agencies like the such, the Biden administration is administration said, because New U.S. Army Corps of Engineers, as prioritizing the project. York and New Jersey hadn’t pledged well as state agencies that might have “This is a regional issue, but one enough cash. jurisdiction, he said. of national significance because if Buttigieg said the Federal Rail Angelo Roefaro, a spokesman there were a failure in one of those Administration and Federal Transit for Senate Majority Leader Chuck tunnels, the entire U.S. economy Administration (FTA) are working Schumer, said Buttigieg has indicated would feel it,” Buttigieg told members with New Jersey Transit and the Port to the New York Democrat that of the House Transportation and Authority of New York and New the environmental review will be Infrastructure Committee. Jersey, as well as with and the approved in May. Crains New York Business Gateway Development Commission, “I’ve said that the new reported that Buttigieg provided on updates to a draft environmental administration could break Trump’s lawmakers with his first update of impact statement issued in 2017. petty Gateway roadblock with the the project. The project was stalled The impact statement is “a big by former President Donald Trump part of what needs to be completed in (continued on page 8)

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he Sydney Metro West Second, Sydney Metro has Olympic Park, North Strathfield, project has received two received planning approval for two Burwood North, Five Dock, The Tmajor planning approvals planned precast facilities at Eastern Bays, Pyrmont and Sydney CBD. in readiness for the tunnel boring Creek, which are to contribute to the Future planning stages are machines to start working by the end construction of Sydney Metro West. required for major civil construction of 2022. The two facilities will manufacture works such as station excavation The planning approvals for the 148,000 precast concrete segments and tunneling between The Bays project are being done in stages for the 24-km (15-miles) twin tunnels and Sydney CBD, for tunnel fitout, because of the project size. between Westmead and Sydney station building and operation of First, the Sydney Metro West CBD. Once built, it is estimated that the line between Westmead and the Project Concept has received planning it will take passengers 20 minutes to central business district. approval from Westmead to Sydney’s travel from Parramatta to Sydney Construction on the Sydney central business district and for the CBD. Metro West project started in late station excavation and tunneling Stations have been confirmed 2020. The first tunneling contracts are between Westmead and The Bays. at Westmead, Parramatta, Sydney likely to be issued in mid-2021. n Gateway: Project would repair tunnels under Hudson (continued from page 6) up that pen and heeded the call to trains under the Hudson River. ‘flick of a pen,’” Schumer said in a free the ‘hostage’ that is Gateway.” Amtrak said it will allow for twice as statement. “The Biden administration The tunnel would carry Amtrak many trains to run under the Hudson and Secretary Buttigieg have picked and New Jersey Transit commuter River, including those that are part of its Northeast Corridor service that connects Boston, New York and TUNNELING SPECIALISTS bradshawcc.com Washington. 410.970.8300 “The FTA is working closely with project sponsors as it advances By combining superior craftsmanship with innovative tunnel engineering and through the capital investment grant construction technology, Bradshaw Construction Corporation successfully provides process prescribed in law, which is cost effective tunneling solutions to the utility and transportation industries. obviously an important part of the picture when it comes to funding,” Buttigieg said. PROVIDING INNOVATIVE SOLUTIONS The Gateway Development FOR TUNNELING PROJECTS Commission said in a statement after the hearing that “we applaud Secretary Buttigieg’s public commitment to the Gateway Program, particularly confirming that the Hudson Tunnel Project is a project ‘of national significance’ and setting a rapid timeline for completing the project’s environmental review.” The commission said it’s working with local and federal partners microtunneling | tbm tunneling | hand tunneling | shaft work to complete the environmental review and improve the project’s grant rating, “so we can start full construction and finally replace a 110-year-old one--in, one- BRADSHAW track-out delay-prone tunnel with a .. CONSTRUCTION CORPORATION 21st Century rail link between New York, New Jersey and the rest of the Northeast Corridor.” n

8 JUNE 2021 Tunneling & Underground Construction ® tuc& NEWSNEWSNEWS First tunnel boring machine reaches future Wilshire/ LA Cienega subway station he first of two tunnel boring were manufactured in underground subway project that will machines (TBM) working on by Herrenknecht AG. Metro has extend the Metro Purple Line from its Tthe D Line (Purple) Extension contracted with Skanska Traylor Shea terminus in Koreatown to Westwood/ project in Los Angeles, CA broke (STS), a joint venture to design and VA Hospital in West Los Angeles. through to the Wilshire/La Cienega build the first section of the project. Section 1 is expected to be completed in subway station in Beverly Hills. The $9.3-billion Metro Purple 2023, Section 2 in 2025 and Section 3 in Metro announced that tunneling Line Extension is a 14-km (9-mile) 2027. n for the first 6.4-km (4-mile) section of the subway project is now two-thirds complete. More than 90 percent of the tunnels have been mined safely and Metro anticipates completing tunnel mining in summer 2021. Excavation for all three subway station boxes beneath Wilshire Boulevard has been completed. Elsie, the 910-t (1,000-st), 122-m (400-ft) long TBM, started west at the Wilshire/Fairfax station on May 29, 2020, and broke through to the Wilshire/La Cienega station site about 1.6 km (1 mile) away on Feb. 25, 2021. Reaching this milestone is a significant win for Metro. Section 1 of project tunneling has presented challenges that have been successfully overcome by the project. En route to Wilshire/La Cienega, the agency’s OUR modern, high-tech TBMs have mined through a unique combination of soils and geologic conditions, including tar sands and methane gas. KIND OF Metro’s TBMs were first lowered into the ground at Metro’s Wilshire/ La Brea station site in the Miracle PLAYGROUND Mile area of Wilshire in October 2018. While advancing, the TBM tunneled This is the natural habitat for Brokk’s compact giants. about 18 m/d (60 ftpd). They worked five days a week, 20 hours a day. With the perfect combination of power, operability Metro’s TBMs are pressurized, and accessibility our robots provide closed-face machines that minimize ground settlement during excavation. eff icient solutions to increase profi ts. The tunnel is lined with precast concrete segments that are bolted together to form a ring. Segments are also gasketed to make the joints between segments water- and gas- Brokk Inc. tight. 1-360-794-1277 When tunneling is finished for this www.brokk.com project section, both of Metro’s TBMs Monroe, WA | [email protected] will have mined nearly half a million cubic yards of earth. The TBMs

Tunneling & Underground Construction JUNE 2021 9 ® tuc& NEWSNEWSNEWS Canada to invest nearly $15 billion for transit projects he Canadian government announced plans to invest achieved with this investment. I am confident that $14.9 billion for public transit project over the next will receive its fair share of funding from this initiative and Teight years. The plans include permanent funding of that it will make a significant contribution to our economic $3 billion per year for Canadian communities beginning in recovery in the wake of COVID-19. Our share of this 2026-27. investment will mean transit expansion, transit vehicles According to a government news release, “This and other system upgrades, jobs and a greener city.” [commitment] provides cities and communities the Markham mayor Frank Scarpitti stated, “This is a predictable transit funding they need to plan for the future, positive sign for the Yonge North Subway Extension, and is part of our plan to create one million jobs, fight York Region’s top transit infrastructure project. It is one climate change and rebuild a more sustainable and resilient of the most studied and justified transit projects in the economy.” country and we cannot wait any longer to get shovels in “When we invest in public transit infrastructure, we the ground. By earmarking these infrastructure dollars, are supporting good middle-class jobs, creating better the federal government is confirming its commitment to commutes, fighting climate change and helping make life making public transit investment a high priority.” easier and more affordable for Canadians,” said Prime Ontario’s transportation minister, Caroline Mulroney, Minister Justin Trudeau. “We will continue to do what it announced that Ontario had selected five priority projects takes to ensure our economic recovery from COVID-19 that it hoped the federal government would fund. Four of and build back a more resilient country for everyone.” those projects are in Toronto, part of the transit expansion Reaction from local municipal leaders was swift. “This plan that Premier announced in April 2019. is great news for Toronto and our transit system,” Toronto Those four projects include: Mayor said. “Over the coming days and weeks, we expect that the details of this commitment will show • Building the Ontario Line Subway between Don the tremendous impact on Toronto transit that will be Mills / East and . • Extending the TTC’s Line 2 Bloor – Danforth subway to McCowan Road / Sheppard Avenue East. • Extending the Line 1 Yonge – University subway to Highway 7 / Yonge . • Extending the light rail transit line to Toronto Pearson International Airport.

In a surprise part of the announcement, Mulroney identified a light rail transit line in Hamilton as Ontario’s fifth priority project for federal funding. The Ontario government controversially canceled the project in December, 2019 after previously committing $1 billion toward building the line. The renewed support for the project may, however, result in a shorter line than Ontario and the City of Hamilton had earlier planned. n

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Professional Get Involved Career Center Development Inspire the next generation of Find a new job or career Earn PDH credits and stay underground engineers and insights at the UCA Career current with a range of support Down for That, an Center and connect with professional development exciting workforce initiative at your next great job. opportunities, both online undergroundcareers.org Create an account at and in person. tunnelingjobs.smenet.org

Make the most of your membership with UCA resources. Learn more at ucaofsme.org

Inspiring tunneling professionals worldwide. ucaofsme.org ® tuc& NEWSNEWSNEWS King County Ship Canal Water Quality Project TBM launched he 6.6-m (21.8-ft) diameter vertical shafts in Ballard, East The tunnel boring machine named Mudhoney earth pressure balance tunnel Ballard, Fremont, Queen launched on April 19. Tboring machine (TBM) named Anne and Wallingford can Mudhoney launched in Seattle, collect stormwater and WA to begin creation of the 4.3-km sewage flows from each (2.7-mile) long tunnel that will store basin and send them 64 m combined sewer overflow as part of to 128 m (40 to 80 ft) below the city’s consent decree with the U.S. ground to the tunnel. To Environmental Protection Agency. bring flows from Queen The $225-million underground Anne into the storage tunnel, storage tunnel is part of the larger an additional 12-m (8-ft) $570 million King County Ship Canal diameter conveyance tunnel Water Quality Project. underneath the Ship Canal Lane Construction, contractor connects the vertical shafts in on the tunnel portion of the project, Queen Anne and Fremont. launched the TBM on April 19 and New pipes will connect the plans to have the overflow tunnel existing sewer system to the ready by 2025. When completed, the shafts. tunnel can, on average, prevent 75 In some parts of Seattle, million gallons of polluted stormwater sewage and stormwater share and sewage from entering the a set of pipes in a combined sewer and is more than 4,300 m (14,200 neighboring waterways. The tunnel and stormwater overflow system that ft) long. The machine includes 18 will capture and temporarily hold can send untreated co-mingled water double-disc cutters, 48 scrapers and more than 29.6 million gallons during into the environment. The region is 16 bucket cutters, with the ability to heavy rains. under federal order to prevent the remove about 360 kt (400,000 st) of Engineering News Record sewage releases. dirt during the dig, including 32 m reported the storage tunnel is part Parts for the TBM were shipped (105 ft) under the Aurora Bridge. of the larger Ship Canal project to Seattle from Germany and Smaller tunneling machines will from Seattle Public Utilities and the assembled in Ballard. create conveyance tunnels under the King County wastewater treatment The machine, which requires 10 Ship Canal between Fremont and division. Along the tunnel path, five to 15 operators, was built new in 2020 Queen Anne and in Ballard. n Chairman’s Column: It has been a privilege (continued from page 2) by the many long phone calls and two years and I hope that we have • more than a dozen U.S. sub- difficult decisions that had to be pushed the ball down the field in a committees, each to support one made. positive way. The staff at SME have ITA Working Group. We now look forward with a been fantastic and supportive, as revitalized desire to get out and always, and deserve more thanks than Looming over the past two meet again in person, a refreshed I can adequately give. I look forward years has been COVID-19. The and expanded pool of active to supporting Mike Rispin as he takes impact on our businesses and industry volunteers and we have a over in the chair and as I slide into professional association has been new strategic plan to capture this the past-chair role of being one of challenging. UCA and SME both enthusiasm and turn it purposely to the old guys complaining from the still exist — quite an achievement the benefit of the tunnel industry. balcony in the Muppet Show! given the many casualties among Finally, but most important, it It has been fun. Thanks very much professional associations. We has been my privilege to serve you everybody. n have run virtual events with some as the Chair of UCA. The Executive Robert Goodfellow success and kept up with industry. Committee has put in a huge amount I would characterize this period of work on your behalf over the past UCA of SME Chair

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ucaofsme.org ® tuc& NEWSNEWSNEWS Record advances at the Brenner Base Tunnel by double-shield tunnel boring machines iners in the Brenner Base covered 860 m (2,821 ft) in one month. machines in the Brenner main tunnels Tunnel are pushing ahead The contracting joint venture BTC had already covered more than 50 Mrapidly with the major rail S.c.a.r.l. (Astaldi S.p.A., Ghella S.p.A., percent of the total distance toward project. On March 31, 2021, they P.A.C. S.p.A. and Cogeis S.p.A.) thus their lot boundary. In stable geologies, achieved a new record while excavating achieved a peak advance rate at the double-shield TBMs are predestined the main tubes in South Tyrol — 860 m Mauls jobsite. For March 2021, the for good tunneling performance. As (2,821 ft) of tunnel bored and lined in Brenner Base Tunnel project owner, the TBM bores, the excavated tunnel one month. Austrian-Italian BBT SE, announced is concurrently lined with concrete On the Italian construction lot an average daily advance rate of 27.7 segments. “Mauls 2-3” of the Brenner Base m (91 m) for Virginia. The daily best At a total length of 64 km (40 Tunnel, three Herrenknecht tunnel performance was 36.75 m (120.6 ft). miles), the Brenner Base Tunnel being boring machines (TBMs) are boring Matthias Flora, sales and built under the direction of Austrian- from south to north. They are at Herrenknecht, Italian BBT SE will be the longest excavating the two main tubes as well as congratulated the team on the jobsite, underground rail link in the world. an exploratory and later service tunnel “Our customer BTC’s crews are It crosses beneath the Alps between 12 m (39 ft) below. In March 2021, a absolute top professionals in their field. Innsbruck in Austria and Franzensfeste new record was set by one of these Congratulations and our utmost respect (Fortezza) in South Tyrol/Italy as a three machines: the double-shield TBM for this achievement.” particularly efficient flat trajectory, that (Ø 10.65 m or 35 ft) named “Virginia” By early April 2021, the two is, with very low gradients. n ITA accepting award nominations he 7th edition of the Even Better” replacing “Overcoming better; Oddities of the Underground; International Tunnelling the challenges.” Innovative and contributing TAssociation’s (ITA) This year the entries can be Underground spaces; Young Tunneller International Tunnelling and submitted in eight categories: of the Year. Underground Space awards welcomes Major Project of the Year - More Entries can be submitted until new applications. than €500 million; Project of the June 30, 2021. The submission ITA Awards 2021 will be a digital Year - between €50 million and requirements and selection process are event. For this edition, a small change €500 million; Project of the Year stated in the ITA Tunnelling Awards is proposed in the categories notably including Renovation - up to €50 website: https://awards.ita-aites.org/ to better specify what is expected in million; Technical Innovation of the account-creation. More information the category “Beyond Engineering - Year; Beyond Engineering - making can be found at https://awards.ita-aites. Making Underground Works Projects underground works projects even org. n

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smenet.org/uca ® tuc& Feature Article 1

Design and construction considerations for intersecting tunnels — Charleston, SC ounded in 1670, Charleston, SC is one of oldest Intelligent Transportation Systems (ITS); and new, energy- cities in the nation. Since its inception, the city efficient traffic signals. The infrastructure reinvestment Fof Charleston has experienced difficulties with (Phases 2 and 3) will consist of constructing improved stormwater management. With rising tidal waters and and additional surface collection systems throughout stronger storms, stormwater management has only become parts of the basins, drilling and sinking several shafts, more difficult. Tunnels and trenchless technology have boring a deep tunnel system to connect the shafts, roots in Charleston dating back to 1928 when a system (Phase 4) constructing an outfall from the pump station of water supply tunnels was constructed to bring a new to the Ashley River and (Phase 5) constructing a new water supply from the Edisto River and Foster Creek pump station adjacent to the Ashley River. Phase 3 was to the Hanahan Water Treatment Plant to supplement designed by Black & Veatch and Davis & Floyd Inc.; the ground water sources. Today nearly 80 km (50 miles) of contractor was Jay Dee Contractors Inc.; and the support tunnels have been constructed or designed in and around of excavation design was completed by FK Engineering. Charleston for water, waste water and storm water conveyance. Geological conditions and concerns The city of Charleston first utilized tunnels to address The geology of the Charleston peninsula is that of storm water in 1999 for their Meeting Street/Calhoun an estuary, and as such, the shallow deposits (surficial tunnel. The city selected tunneling to minimize utility soils) are influenced by a combination of marine and impacts and public disruption. Two additional storm continental processes. The surficial soils were deposited in water tunnels have been completed since the Meeting a range of sedimentary facies including fluvial, overbank, Street/Calhoun tunnel. The Market Street Drainage tidal marsh, tidal channel, tidal flat, lagoon, beach, barrier Improvements Project tunnel was completed in 2013 and island and shallow marine. Characterized by its extremely the final phase of the project is pending construction. The low shear strength and high clay content, the surficial soils US17 Spring/Fishburne Drainage Improvements Project are susceptible to significant consolidation and settlement tunnel system was completed in summer 2020. Additional over time. As a result, large portions of the peninsula, basins in the Charleston peninsula also have conceptual including city streets, are slowly subsiding. However, 15 to tunnel systems that may be implemented in the future. 21 m (50 to 70 ft) below these surficial soils is a geologic The city of Charleston’s Spring/Fishburne US17 formation locally referred to as the Cooper Marl. The Drainage Improvements Project is a five-phase program Cooper Marl is a relatively thick layer 45 to 60 m (150 designed to alleviate flooding in two drainage basins to 200 ft) of olive-green, calcareous, medium-to-stiff, covering approximately 202 ha (500 acres), or about sandy/clayey silt. It is an excellent engineering medium 20-percent of the Charleston peninsula. This project has used extensively for its load-bearing and self-supporting several objectives: to improve the mobility, efficiency, attributes. Large buildings are almost exclusively founded emergency preparedness and community livability; on pile supports that extend into the Cooper Marl. The and, most importantly, to alleviate many of the flooding Cooper Marl’s strength and standup time can primarily problems by reinvesting in the infrastructure. be attributed to the calcareous bonds, as depicted in Fig. 1. The transportation advancements (Phases 1 and 2) However, these bonds are easily broken by traditional and incorporated safer travel lanes for vehicles; improved modern mechanical tunneling methods. intersections for pedestrian safety and vehicle efficiency; Design The tunnel system was designed to capture the storm Steve Kirk, Michael Miglioretti, Kyle water flows from select low points within the Spring and White, Lindsey Schneider, Jeffrey P. Fishburne basins via drop shafts and transport the storm water through the tunnel system via a pump station and Kolzow outfall to the Ashley River. The tunnel was designed to a depth of 37 to 46 m (120 to 150 ft) below the ground Steve Kirk, senior engineering project manager, surface to ensure adequate clearance was maintained City of Charleston; Michael Miglioretti, Kyle White, from the surficial soils and existing/future building piles, member UCA of SME and Lindsey Schneider are bridge piers and existing waste water tunnels in the field engineer, resident engineer and , project vicinity. The system is comprised of approximately Black & Veatch and Jeffrey P. Kolzow, member UCA 2,566 m (8,420 ft) of cast-in-place 2.4 to 3.6 m (8 to 12 of SME, is project engineer, Jay Dee Contractors, Inc. ft) finished internal diameter (ID) tunnels, four large- email [email protected]. diameter access shafts 6 to 9 m (20 to 30 ft ID) and eight drop shafts 122 to 137 cm (48 and 54 in. ID).

16 JUNE 2021 Tunneling & Underground Construction ® tuc& Fig. 1 Cooper Marl exposed during adit excavation and initial support. The system design includes four access shafts and two intersecting tunnels. The access shafts were generally referred to as follows: Lockwood Drive, Harmon Field, Cannon Street and Coming Street. The two tunnels were the Main Line Tunnel and the President Street Branch Tunnel. The Main Line Tunnel extended about 680 m (2,225 LF) from the Lockwood Drive Access Shaft approximately 0.3 percent upgrade to the Intersection, and then 895 m (2,935 LF) approximately 1.0 percent upgrade to the Coming Street Access Shaft. The President Street Branch Tunnel runs about 396 m (1,300 LF) from the Harmon Field Access Shaft 0.3 percent downgrade to the intersection, then about 680 LF 0.3 percent upgrade to the Cannon Street Access Shafts. This “V” shaped process was repeated until the caisson was extended alignment serves to ensure that any entrained air can through the surficial soils and Cooper Marl to the full travel back to either the Harmon Field Access Shaft or depth of the caissons. The shafts were excavated within Cannon Street Access Shaft and that storm water flows to the surficial coils with a clamshell-type bucket mounted the Lockwood Drive Access Shaft, where a wetwell, pump on a crane, and within the Cooper Marl using a small station and outfall will be constructed in future phases. mechanical excavator and muck box for spoil removal. The intersection location and geometry was a result This excavation and support methodology allows for of construction easements and hydraulic boundary the initial support to act as the final shaft lining. Wall conditions. Figure 2 provides an aerial view of the surface thickness design required a minimum of 46 cm (18 in.) of above the intersection. The President Street Branch reinforced concrete. This thickness applied for both 6-m Tunnel was designed to run directly beneath President and 9-m (20-ft and 30-ft) shafts. An approximately 1.5 m Street in downtown Charleston. The Main Line Tunnel (5 ft) 6 m (20 ft shafts) or 2.5 m (8.5 ft) 9 m (30 ft shafts) alignment generally follows the Septima P. Clark Parkway thick concrete invert plug was designed to account for (US17), locally referred to as the “Crosstown,” which buoyancy forces. cuts across the Charleston peninsula. Stakeholders along The Lockwood Drive Access Shaft design consisted President Street and the Septima P. Clark Parkway include of a two-pass construction method. Initial support utilities, schools, homes and local businesses. The resulting through the surficial soils, and a minimum of 3 m (10 ft) Intersection design helped minimize impact to these into the Cooper Marl, was to be constructed of concrete stakeholders. caisson, sheet piling, secant piles or through Support of excavation for the tunnels was designed the surficial soils. Following support 3 m (10 ft) into the for a two-pass installation method. The cast-in-place Cooper Marl, initial support consisted of ribs and lagging, concrete final lining for the tunnel system used liner plate or other contractor-selected support through polypropylene fibers to reduce crack frequency and the Cooper Marl. The final lining design consisted of 45- width. Steel reinforcement was only used at tunnel-adit cm (18-in.) minimum reinforced cast-in-place concrete. junctions, tunnel-shaft junctions and at the Main Line Tunnel-President Street Branch Tunnel intersection Project construction (the Intersection). The typical minimum thickness of Lockwood Drive Access Shaft. The first shaft the concrete lining was 31 cm (12 in.). The Intersection constructed was the Lockwood Drive Access Shaft concrete minimum thickness was 51 cm (20 in.). (LDAS). The LDAS acted as the primary support shaft Three of the four access shafts (Coming, Cannon and for the Main Line and is the future Harmon Field) were constructed using the caisson-sinking location of the tunnel system pump station. The Main Line method. A cast-in-place circular reinforced concrete Tunnel invert meets the LDAS about 10 m (35 ft) above caisson could sink under its own weight as the native the base slab invert. This 10 m (35 ft) sump will be used material in the center of the structure was excavated. for future tunnel dewatering pump installation and act as Excavation was stopped at regular intervals to allow a sediment basin for the tunnel system. casting of the subsequent portions of the caisson. The The LDAS is situated on a marsh adjacent to the

Tunneling & Underground Construction JUNE 2021 17 ® tuc& Feature Fig. 2 Article 1 Aerial view of surface above the intersection; President Street runs top-left to bottom-right and the Septima P. Clark Parkway is the six-lane road running from bottom-center to top- center. annulus through a series of 5-cm (2-in.) PVC piping running vertically through the shaft walls, reducing the skin friction that could otherwise cause the caisson to “hang-up” in the Cooper Marl. The pipes expelled the bentonite to the outside of the caisson walls. Following excavation and sinking, the annulus space outside of the caissons was grouted to fill the voids prior to excavating for the tunnel eyes. The contractor and its design engineer elected to increase the caisson wall thickness as an additional measure to facilitate sinking in the Cooper Marl formation. The 6-m (20-ft) Ashley River. To account for flooding from extreme high- ID shafts (Coming Street and Cannon Street) were 0.7 m tide events and tropical storms, the shaft area was built up (2.5 ft) thick. The Harmon Field Access Shaft 9 m (30 ft from EL 0.5 m (1.5 ft) to about EL 3 m (10 ft) with clean ID) was 1 m (3 ft) thick. The depths of the shafts ranged sand, general fill and a stoned surface. from 37 to 46 m (120 to 150 ft). Support of excavation in the surficial soils utilized The contractor was required to prevent steel sheet piles supported internally with steel ribs. The uncontrollable sinking, which is more typical and sheet piles were socketed approximately 3 m (10 ft) in problematic in the weaker surficial soils above the the Cooper Marl. Excavation was accomplished with a Cooper Marl. In order to prevent uncontrollable sinking, clamshell bucket and a small mechanical excavator. The the contractor preloaded the shaft with hydraulic contractor installed a 1.5-m (5-ft) tall concrete collar jacks. The hydraulic jacks were anchored to a concrete which transitioned the support of excavation from the counterweight with steel threaded rods and applied sheet piles to a ribs and lagging system. The ribs and force to a steel frame that was placed on the shaft. As lagging extended through the Cooper Marl to the invert a result, the hydraulic force was exerted onto the shaft. of the shaft excavation. The pressure applied was generally representative of the The LDAS used a 9-m (30-ft) internal diameter cast- next concrete lift, or approximately 145 to 163 t (160 to in-place concrete final lining. The concrete final lining 180 st). If sinking was noted while the hydraulic jacks was a minimum of 45 cm (18 in.) thick and reinforced were active, force would continue to be applied until no with steel rebar. The shaft used a 2.5-m (8.5-ft) thick base additional sinking was noted. The hydraulic jacks were slab with the top of slab at approximately EL -52 m (-170 applied to the shafts in order to prevent uncontrollable ft). Shaft concrete final lining was installed from EL -52 sinking during concrete placement. The hydraulic jacks m (-170 ft) to EL -9 m (-30 ft). The final lining terminates were also utilized during the excavation process in order at EL -9 m (-30 ft) where it will connect to future wet well to encourage incrementally controlled sinking versus and outfall construction. unexpected and uncontrollable sinking. The caissons were constructed in 3.6-m (12-ft) lifts Caissons. The Coming Street, Cannon Street and with a modular set of 4.2-m (14-ft) tall internal and Harmon Field Access Shafts were constructed using the external concrete forms. The additional height was used caisson sinking method. In order to facilitate sinking, the for 0.3 m (1 ft) of overlap at the bottom and 0.3 m (1 contractor used a “cutting shoe.” The cutting shoe was ft) of gap at the top for water-stop installation. These a tapered cylindrical steel structure built with a larger forms were only tied together at the top of the forms; outside diameter than the typical caisson cross-section. wall-penetrating form ties were not used. The shafts The cutting shoe aided sinking by reducing the bearing were maintained in a flooded state while excavation surface of caisson and creating a shear plane to loosen progressed through the surficial soils. The flooded state excavatable material and direct soils to the interior of the prevented the surficial soils from running into the interior caisson as the shaft was sunk. In addition to the cutting of the shaft during excavation and sinking activities. Once shoe, the contractor pumped bentonite slurry into the the caisson reached 3 to 6 m (10 to 20 ft) of embedment

18 JUNE 2021 Tunneling & Underground Construction ® tuc&

into the Cooper Marl, the interior could be dewatered. excavation progressed. Voids behind the initial support were filled with grout. The remaining adits were excavated Tunnel and adit initial support. The Main Line Tunnel via hand-mining techniques. (approximately 1,650 m (5,400 LF) was excavated upgrade Excavation advancement in the adit tunnels was from the Lockwood Drive Access Shaft to the Coming generally consistent throughout the project. Following Street Access Shaft. Means of excavation included a initial support and breakout from either of the primary refurbished open-face soft-ground tunnel boring machine tunnels, the contractor would “bench” the excavation so (TBM). The TBM bore was approximately 4.5 m (15 ft) that the crown of the excavation was one-to-two initial and utilized a ribs-and-lagging initial support system. support sets ahead of the spring-line and invert support. The initial support consisted of steel ribs (W4x13) on Initial support consisted of rolled steel ribs (W4x13) for approximately 1.5-m (5-ft) centers with mixed hardwood the crown and steel beams (W4x13) supporting the ribs. lagging between the sets. The ribs were assembled within The steel was typically installed on 1.5-m (5-ft) centers the tail shield of the TBM and expanded tightly against with mixed hardwood lagging. Voids behind the initial the ground after the machine had moved forward. Muck support were filled with grout. was removed from the heading using rail-mounted muck cars. Tunnel and adit final lining. The tunnel and adits used The first 67 m (220 ft) of the Main Line Tunnel was a cast-in-place concrete final lining. The concrete was converted to a 4.5 m by 4.5 m (15 ft by 15 ft) horseshoe. reinforced with polypropylene fibers. Steel reinforcement This horseshoe section of the tunnel allowed for the was only used at tunnel-adit junctions, tunnel-shaft installation of a rail switch for expediting the tunnel junctions, and at the Intersection. The tunnel concrete excavation. Two muck car trains were utilized during forms were reusable, collapsible steel forms. A keyway excavation. While one train was being loaded with was installed at the face of each concrete segment/ excavated material, the other train would be unloaded placement. The pumping location moved as needed to into a muck area on the surface. Each train generally facilitate the concrete pump capabilities. Concrete was consisted of four 15 cy muck cars, a diesel-powered pumped through a steel slickline with pumping distances locomotive, and a flat car for supplying the initial support reaching 610 m (2,000 ft). system to the TBM. A tail tunnel was also utilized to The Main Line Tunnel finished internal diameter facilitate unloading muck trains. The tail tunnel was was 3.6 m (12 ft). The concrete was placed in a series of constructed with ribs & lagging initial support and segments ranging in length, typically 24 to 37 m (80 to ultimately abandoned with flowable fill grout. 120 LF). Concrete segment lengths would generally vary The President Street Branch Tunnel (approximately to account for tunnel alignment curvature or planning 610 m (2,000 LF)) was excavated downgrade from the around junctions. Concrete for the Main Line Tunnel Harmon Field Access Shaft to the Main Line Tunnel was pumped from the surface from the Lockwood Drive Intersection, then upgrade to the Cannon Street Access Access Shaft the Courtenay Drop Shaft, the Cannon Shaft. Means of excavation included a refurbished open- Street Access Shaft and the Ashe Drop Shaft. The face soft-ground TBM. The TBM bore was approximately formwork was advanced mechanically with an electric- 3.3 m (11 ft) and utilized a ribs and lagging initial powered hydraulic form carrier. Concrete was placed at support system. The initial support consisted of steel an approximate 0.3 percent grade from the Lockwood ribs (W4x13) on approximately 1.2-m (4-ft) centers with Drive Access Shaft to the Intersection and approximately mixed hardwood lagging between the sets. The ribs were 1.0 percent grade from the Intersection to the Coming assembled within the tail shield of the TBM and expanded Street Access Shaft. tightly against the ground after the machine had moved The President Street Branch Tunnel finished internal forward. Muck was removed from the heading utilizing diameter was 2.4 m (8 ft). The concrete was placed in rail mounted muck cars. The President Street Branch a series of segments ranging in length, typically 27 to Tunnel did not utilize a tail tunnel or switch during the 38 m (90 to 125 LF). Concrete segment lengths would excavation process. generally vary to account for tunnel alignment curvature There were eight adit tunnels extending from the or planning around junctions. Concrete for the President primary tunnels to the previously installed drop shafts. Street Branch Tunnel was pumped from the surface from Along the Main Line Tunnel were seven adits with the Harmon Field Access Shaft and the Cannon Street the remaining adit extending off the President Street Access Shaft. The formwork was advanced mechanically Branch Tunnel. Adit tunnel excavation ranged from with an electric-powered hydraulic form carrier. The approximately 1.5 m (5 LF) to 163 m (535 LF) along concrete was placed approximately 0.3 percent downgrade the alignment. The longest adit, extending to the Cherry from the access shafts to the Intersection, creating a Street Drop Shaft, was excavated with a combination of “v” shape from the Intersection up to both access shafts mechanical (roadheader) and hand-mining techniques. (Harmon Field and Cannon Street). Muck was removed from the Cherry Street Adit with The finished internal diameter for the eight adits a pair of skid steers traversing through the adit as the was 2.4 m (8 ft). The concrete was placed in a series of

Tunneling & Underground Construction JUNE 2021 19 ® tuc& Feature Article 1

Fig. 3 Completed Intersection initial support; President Street Branch Tunnel (left) and Main Line Tunnel diameter at the Line Tunnel. Intersection was potential air entrainment and impact to the hydraulic design of the tunnel system. Addressing the entrained air, the Project team proposed casting pipes in the crown of the Intersection concrete. The pipes would connect the crowns of the two 3.7-m (12-ft) diameter sides of the Main Line Tunnel in order to allow for air to flow upgrade toward the Coming Street Access Shaft, as originally designed. This proposal was ultimately accepted and pursued. Another challenge regarding initial support of the Intersection was maintaining positive ground support. The contractor constructed two 3.7 x 3.7 m (12 x 12 ft) adits branching out from the Main Line Tunnel. These adits extended out into native ground to receive the President segments ranging in length, typically 3 to 15 m (10 to 50 Street Branch Tunnel TBM. The TBM would then “walk” LF). Seven of the eight adits were completed with one to through the intersecting Main Line Tunnel and relaunch three segments. The Cherry Street Adit, approximately through the opposite adit. The completed initial support 163 m (535 LF), required a series of segments to complete. system is displayed in Fig. 3. Typical segments length was 15 m (50 LF), varying as needed around curves or at the Main Line Tunnel Intersection final lining. The Intersection was the final junction. Concrete final lining for the adits was designed concrete placed for the tunnel system. The contractor and installed with a flat (0 percent) grade. was elected to complete the Main Line Tunnel, President Street Branch Tunnel and adit final lining concrete prior Intersection construction to forming and placing concrete in the intersection. Intersection initial support. The proposed junction The concrete in the Intersection was formed with a design needed to address a series of challenges. One of the combination of custom-built formwork along with primary challenges was maintaining the minimum design repurposed 2.4-m (8-ft) ID formwork used for the wall thickness in the Intersection. The designed wall President Street Branch Tunnel final lining, referred by thickness in the intersection was 20 cm (8 in.) larger than the contractor as “fish mouth” forms. the typical tunnel section (50 cm (20 in.) instead of 31 cm The concrete along the Main Line Tunnel used (12 in.)). custom-built forms constructed out of steel ribs, timber, The Main Line Tunnel TBM bored an approximate plywood and mixed hardwood lagging. The steel ribs 15-ft (180-in.) diameter tunnel. When accounting for the were rolled to an approximate diameter of 3.3 m (11 initial support, approximately four inches thick, or 20 ft). Between two steel ribs was plywood reinforced with cm (8 in.) impacting the diameter, the resulting initial 1.5-m (5-ft) long two-by timber, resulting in 1.5-m (5-ft) support diameter was approximately 437 cm (172 in.). The long “quadrant” pieces. Two quadrants bolted together designed final internal diameter was 3.7 m (12 ft) along resulted in one 1.5-m (5-ft) long invert section piece. the Main Line Tunnel 365 cm (144 in.). With the initial The preassembled quadrant pieces were mobilized to support, this resulted in an approximate 36-cm (14-in.) the Intersection via locomotive along the President projected wall thickness. In order to achieve the required Street Branch Tunnel. The quadrants were hoisted with 50 cm (20 in.) minimum, the contractor proposed reducing a previously installed steel monorail, assembled into the Intersection opening to 3.3 m (11 ft) along the Main 1.5-m (5-ft) invert section pieces, and stored in the Main Line Tunnel. This design would align inverts at the Line Tunnel for future installation. The concrete along Intersection, but the crown would drop down about one the President Street Branch Tunnel utilized repurposed foot along the Main Line Tunnel. 2.4-m (8-ft) steel formwork previously used for the The primary concern regarding reducing the Main President Street Branch Tunnel concrete lining. The

20 JUNE 2021 Tunneling & Underground Construction ® tuc& Fig. 4 Completed Intersection final lining; President Street Branch Tunnel (left) and Main Line Tunnel.

forms were torch-cut offsite to configure the unique were used to properly consolidate the concrete. The Intersection geometry. Steel spuds were installed along contractor installed temporary PVC pipes at both crown the invert and spring-line in order to hold the custom ends of the Main Line Tunnel forms to expel air as forms during install and prevent shifting during concrete the forms were filled. The Intersection final lining was placement. Steel bracing was also installed to prevent successfully completed in March 2020 and can be seen in form movement during placement. Fig. 4. The first concrete placement was about 180 cu yd. Concrete was pumped from the Courtenay Drop Shaft Conclusion through about 305 m (1,000 LF) of steel slick line. The Successful completion of this unique and complex concrete was distributed throughout the forms using a project required coordination and communication series of valves and hoses. The valves were connected to between the project team. The US17 Spring/Fishburne additional slick line which extended out from the Main Drainage Improvements Project tunnel system was Line Tunnel centerline to the forms. The concrete was completed in summer 2020. The fourth phase is currently adequately vibrated to ensure proper consolidation and under construction which includes construction of the flow around the forms. Following completion of the first wet well and outfall. The drainage system will be fully concrete placement, a PVC waterstop was installed, operational after the completion of the final fifth phase. along with a keyway, at the interface between the first The authors would like to thank the city of Charleston and second placements. for their permission to publish this paper and whose work The crown used similar custom formwork as the provided the basis for this paper. Charleston is a showcase invert placement. However, the timber-reinforced for the increasing viability of underground construction plywood was replaced with 0.6-cm (0.25-in.) thick by 1.5 techniques and other communities can benefit from m (5 ft) steel plates reinforced with mixed hardwood the city’s foresight and ingenuity. Charleston has lagging. Initially the contractor had planned to strip the demonstrated that determination and strong leadership Main Line Tunnel invert forms and reuse for the second do eventually pay off. concrete placement for the crown. The contractor elected The authors would also like to thank the project team: to construct additional custom forms on top of the Black & Veatch, Davis & Floyd, Jay Dee Contractors Inc., installed invert forms. This new approach allowed for the and FK Engineering for their considerable contributions structural benefit of circular forms. for the completion of this project. Black & Veatch and Concrete for the second placement was pumped Davis & Floyd Inc. acted as the owner’s engineer for from the Courtenay Drop Shaft through about 305 m the project. Jay Dee Contractors Inc. was the contractor (1,000 LF) of slick line. About 110 cu yd of concrete was for this third phase of the drainage system and provided needed to complete the second placement. Concrete was unyielding expertise and craftmanship. FK Engineering pumped through a series of ports installed at the crown was the design engineer for the contractor. FK in the Main Line Tunnel custom forms and President Engineering produced initial support of excavation design Street Branch Tunnel fish-mouth forms. Form vibrators and contributed to the final support design. n

Tunneling & Underground Construction JUNE 2021 21 ® tuc& Feature Article 2

Hybrid metro station for mitigation of construction disturbance

apital cities of the world have made a common research and innovation and finally leadership. observation that large population increases have Hybrid station concept has come from a mix of cavern Cled to traffic congestion, unpleasant conditions and open-air excavation to minimize surface footprint and of life, downgraded economy and unsustainable keep city activity unaffected. development. They have invested in public transport Many interesting examples can be found in New systems constructed under tight urban constraints in order York City, NY (USA), Barcelona (Spain), Stockholm to maintain activity and mobility. The so-called quality of (Sweden), and Hong Kong (China). As a leader in large life has been exacerbated by competition and rankings by bored tunnel and complex underground construction, various journals and organization such as The Economist. our company has promoted such schemes in tender and This article presents the concept of hybrid stations as development phases to provide better value for money for developed or constructed in large cities to keep mobility the inhabitants. and business unaffected during construction works. Large bored tunnels, large rock excavations, under-river Amsterdam Metro, initial concept (2002) construction provide interesting alternatives to traditional Amsterdam is the capital city of the Netherlands open-air construction. This article reviews a 20-year with a population of 1.5 million. The city lays on a vast experience at Bouygues Travaux Publics of alternative sedimentary plain filled with a series of loose sandy soils station concepts to minimize construction disturbance and and soft clays. The majority of the country is near sea level loss of mobility and economy during construction. and protected from flooding by a long sea defense line along the shore. The North-South metro line was launched City competition in 2001 on strict requirements for no road closure and no The Economist ranked 140 major cities on a global impact on buildings. As a consequence, the program of liveability index based on five criteria: works was extended and a new concept tested with large tunnels housing train platforms and requiring mini access • Stability — In relation to crime, threat and boxes as a substitute for large stations. conflict. Figure 1 compares three alternatives: • Healthcare — Availability and quality. • Culture and environment — Climate, corruption, 1. Single-track tunnel and central platform with censorship and sporting. TBM near 6.5 m (21 ft) in diameter and street • Education — Availability and quality. more than 20 m (65 ft) wide. • Infrastructure — Auality of road and public 2. Double-track tunnel and side platform with TBM transport, telecommunication and water. near 10.45 m (34 ft) diameter and street more than 22 m (72 ft) width. In the world, Australia, Central Europe, and 3. Stacked-track tunnel and integrated platforms Canada take the prime positions. In the United States, with TBM near 13.6 m (45 ft) diameter and same Honolulu takes the lead, followed by Atlanta, GA; street width. Pittsburgh, PA; Seattle, WA and Washington, D.C. Public mobility creates comfort and quietness for Stations built around traditional single-track or inhabitants, provides free time and opportunities for double-track tunnels have their surface dimensions culture and education, and reduces stress and pollution governed by length and width of platform. Surface in relation to healthcare. It is a prerequisite for liveability dimensions of modern stations built around superposed and many cities invest massively in public transport to track tunnels are governed by vertical circulation and provide superior conditions for business, communication, ventilation box but not any more by platform sizes (Fig. 2). Passenger access shaft can be limited to 50 m (160 ft) in length and 12 m (50 ft) in width and located in side streets Oliver Martin keeping traffic in the central artery with minimum impact. The surface area reduces from 4,650 m2 (50,000 sq ft) Oliver Martin, member UCA of SME, is technical down to 1,100 m2 (12,000 sq ft) or a ratio nearly 4 to 1. director in charge of railway projects (ESTP-UCD) At that time, the worlds largest TBM was 14.9 m (49 Bouygues Travaux Publics, email o.martin@bouygues- ft) as developed by Bouygues for the construction of the construction.com. Groene Hart tunnel in the Netherlands and superposed ® tuc& Fig. 1 Tunnel and station size for double tunnel, single tunnel and supeposed track tunnel.

track tunnel was at the edge of knowledge. Today, the architectural expression. worlds largest TBM is 17.7 m (58 ft) as constructed also by The station was located in fresh granite with faulted Bouygues for the recent Tuen Mun Check Lap Kok tunnel areas either side of the station and variable topography. in Hong Kong. Superposed track is no longer near the The detailed design and risk analysis concluded in edge of knowledge and technology. It is open to almost all deepening the excavation level of the station to 42 m (140 soft soil conditions. ft) below ground, drastically increasing rock excavation and adversely delaying the construction program. A Sandton Station Gautrain (2006-2010) review of cavern alternatives was introduced to minimize Johannesburg is the financial capital of South Africa rock excavation and keep program within contract. with a population of more than 4 million. In 2005, Six cavern options were developed in parallel from Bouygues Travaux Publics was awarded the Gautrain a single large double-floor cavern with span of 25 m (82 rapid rail link project on a concession basis with ft) in length, to a dual medium size-double floor cavern geological risk to the contractor. The project was a stand- with unit span of 15 m (49 ft) in length and a triple narrow alone 75-km (46-mile) long, 10 stations and one depot single-floor cavern with unit span of 9 m (30 ft) in length. international gauge project with a 15-km (9-mile) long Option six, shown in Fig. 3, consisting of a dual cavern underground section from the center of Johannesburg with single and stacked-track cavern configurations to the city of Marlboro on its outskirts. Located in the together with central platform access. It was considered business district, Sandton station was the masterpiece of most appropriate in keeping cavern dimensions the project with highest passenger exchange and specific reasonable, rock excavation minimum and easy access to service direct to the airport terminal. Gautrain project platforms. was presented at conferences in Chicago, IL in 2008 and It was further developed and constructed. Surface Moscow in 2013 for its interest in both structural and works were reduced from a traditional 165 m (540 ft)

Fig. 2 Transverse view of ventilation, cooling and passenger access box.

Tunneling & Underground Construction JUNE 2021 23 ® tuc& Fig. 3 Cross-section of shaft and cavern and exploded perspective of Sandton station in Johannesburg.

width by 30 m (100 ft) box down to two access shafts of Bay and compared for construction volumes and impact 56 m (220 ft) length, 17 m (56 ft) width and 20 m (65 ft) to the city. The project was 9.6-km (6-mile) long and length, 15 m (50 ft) reducing the surface area from 4,950 included 19 stations in three consecutive loops. Due to the m2 (53,000 sq ft) down to 1,440 m² (15,000 sq ft) or a ratio extreme heat during the day, the surface project became of 3.5 to 1. The program was met and Sandton station underground and located under the main of the opened for the Soccer World Cup in June 2010. district. The construction of the stations impacted both Aerial photos in Fig. 4 provide an overall impression utilities and road traffic. of the station in the city and traffic. The two side- Four tunnel options, (Fig. 5), were compared in terms platforms are distance of 14 m (46 ft) and the dedicated of construction, surface impact, program and cost: airport service on the lower deck is only separated by 4.25 m (14 ft) height difference with the other platforms from 1. A traditional single tunnel including side-to-side which means that rapid interconnection between the lines tracks. is achieved. It is a great functional design and a popular 2. A traditional double tunnel including single track success. in each. 3. A vertically stacked double tunnel with single Doha West Bay concept track in each. Doha is the capital city of Qatar with a population 4. A single tunnel with stacked track inside. The later of around one million and West Bay is its financial and tunnel is big enough to incorporate the station business district. The city lays on a series of surficial fill, platforms. dolomitic limestone, shale and chalky limestone. It is proper for traditional and mechanised construction. The comparison is summarized in Table 1 in terms of In 2012, options were developed for connecting West quantities, surface impact, program and final estimate.

Fig. 4 Aerial photo of overall site at Sandton and photo of cavern during construction.

24 JUNE 2021 Tunneling & Underground Construction ® tuc& Fig. 5 Four options: base single tunnel, dual tunnel, dual stacked tunnel, single stacked-track tunnel.

Table 1 Initial screening of four comparative options.

Tunnel & station Unit Single dual-track Dual tunnel Dual stacked Single stacked comparison tunnel tunnel track tunnel TBM dia ft (m) 33’ 6’’ (10.2) 21’ (6.4) 21’ (6.4) 40’ 8’’(12.4) Station levels # 2 3 4 4 Station width ft (m) 88’ 7’’ (27) 72’ 2’’ (22) 65’ 8’ (20) 46’ (14) Excavation volume M ft3 98 72 87 61 Concrete volume M ft3 30 21 20 16 Surface impact M ft² 1.6 1.3 0.8 0.4 Final loop opening months 69 65 65 57

Option four, single stacked-track tunnel with and natural ventilation and also in terms of passenger integrated platform was ranked highest with economies experience with a through view inside the stations. in excavation and concrete volume of 20 to 40 percent, in construction program of 8 to 12 months and cost of 20 Cairo Metro Alternative Station (Concept 2016) percent. Surface impacts were divided by a ratio of four Cairo is the largest and busiest city in Africa with more with respect to base single tunnel. than 10 million inhabitants. Its metro was initiated in the On the particular configuration of Doha, the early 1970s, its development has been uninterrupted since comparison of data was clear because the 500-m (1,640- and construction of line 3 phase 3 and line 4 is ongoing. ft) spacing between stations was short and the increase in The city is located around the Nile River in a deep alluvial tunnel diameter did not over pass the reduction in station basin principally sandy layers with impervious clay layers volume. Figure 6 gives architectural views and shows the around 100-m (330-ft) depth. A smaller derivation of the interest in terms of sustainability with direct sun access river has created Zamalek Island.

Fig. 6 view of the double stacked tunnel (courtesy of Grimshaw ).

Tunneling & Underground Construction JUNE 2021 25 ® tuc& Fig. 7 Location of alternative station under the lower Nile River and exploded view.

Two stations were located either side of the a major growth due to immigration. The historic public secondary Nile River bed and an alternative proposal transport combines a traditional service in the was made to relocate one station under the Nile River city and a train network extending far outside the city. with passenger accesses from both sides as shown in Fig. Melbourne has been named the most liveable city in 7. Marine access, site installation on river banks, distance the world for several years in a row and the standard of from sensitive receivers and limited utility and traffic living is clearly a priority. disruptions were of significant interest. In 2016, the city launched a modern underground The alternative involved the construction of an metro concept in increasing capacity in the North-South artificial island and closure of secondary Nile River corridor and relieving stress on the other lines as well. bed with precautions to ensure water overpass in case The project includes 6 miles (9 km) of dual single-track of flooding, and soil treatment to allow excavation of tunnel and accommodates five stations of which two are diaphragm walls. Construction was intended to proceed built in the city center with severe constraints and three on shore with diaphragm wall sealed into watertight clay are built in the student districts with traditional open layers and excavation down to tunnel level to let the excavation under the major artery roads (Fig. 8). TBM pass through. The platform was incorporated into State Library and Town Hall stations are the two the underwater trench in such a way that permanent central stations, they are built under Flinders street configuration of the secondary river bed could be re- with underground side access from shafts located under established at the end of construction. The under-river future development. The architectural style is green and box was terminated on the banks with access boxes generous. running along the shore and letting people go in and out The stations are built in sedimentary rock called from either side of the river. Melbourne formation. The cavern is excavated with rock support and shotcrete from three shafts located two on Melbourne Metro CBD Stations (2017-2022) one side and the third on the other side of the road. The Melbourne is the second largest city in Australia caverns houses the concourse and central platform and and houses the largest universities of the country. Its offers 20 m (66 ft) width between platform screen doors. population exceeds four million and the city anticipates Passengers exit from the platform up then sideway to

Fig. 8 Schematic view of Melbourne future underground metro line (Courtesy of Weston-Williamson).

26 JUNE 2021 Tunneling & Underground Construction ® tuc& Fig. 9 Principal construction stages of the cavern under Flinders Street.

Fig. 10 Cross-section of adit in the middle of cavern.

the shafts. The cavern is 29 m (95 ft) wide and 14 m (46 promoted the development of alternative station ft) high. It is supported by two rows of columns either concepts departing from traditional braced and open-air side of the vertical circulation. It is constructed in three excavation. temporary stages namely a central excavation, central Hybrid stations have benefited from the ongoing temporary support and side excavation (Fig. 9) and three development of large bored tunnels in soft soil and large permanent stages namely concreting of the base slab and caverns in rock. Both provide interesting options to permanent columns followed by the transfer beams and adjust to available land and necessary continuity of the central and then side walls and roof. city during the construction stage. The connection between cavern and shaft, shown in Large tunnels with stacked tracks and integrated Fig. 10, is the key element that governs the whole design platforms have been tested successfully and have and construction methodology. Its space is split into provided acceptable solutions for railway systems and passenger access and dedicated fire brigade intervention, for public building safety. Under-waterway stations are into fresh-air supply and smoke extraction ducts, into interesting options. Large caverns accessed by side shafts corridors for HV feed and LV distribution cables and are valid alternatives for station in rock. Anticipation and into any other services required in the cavern. The cross- care is required on the functionality and construction of adits are 17 m (56 ft) wide and 24 m (78 ft) high, they are adits. larger than the platform cavern and also more critical for Construction technology and numerical simulations rock stress during construction. They extend 6 m (20 ft) have allowed to go further into friendly construction, above cavern top which reduces rock cover and also 4 m minimizing impact during construction while enhancing (13 ft) below the track that increases vertical span. safety during operation. n

Conclusions References The global demand for mass transit projects in large Martin O., Chauliac A., Funck P., 2008, Gautrain, a modern rapid transit cities has affected both historic and business centers. system in a progressing country, South Africa, in Creating and renewing Elevated stations are complicated and underground urban structures, 17th Congress of IABSE, Chicago, United States of alternatives have become the norm where space is America constrained. Keeping major roads unaffected and Martin O., 2013, Stations of Gautrain, proximity, architecture and services, in Next station, Moscow, Russia local business alive have become common and have

Tunneling & Underground Construction JUNE 2021 27 ® Personal News tuc& UCA of SME News UCA returns to in-person meetings with RETC in Las Vegas, NV by Margo Ellis, Associate Editor ture the same level or technical con- projects, large span tunnels and cav- tent attendees have come to expect erns, new and innovative technologies et ready to turn off the Zoom from previous meetings. 1 and 2, future projects, pressurized conference calls, and prepare “We really looked at previous face tunneling, SEM applications and to return to in person meet- G conferences to see what they had, we projects, geotechnical considerations, ings at the RETC conference from tweaked it a little bit and I think we microtunneling and trenchless tunnel- June 13-16, 2021 in Las Vegas, NV. came up with a good program,” said ing, project planning and risk manage- RETC marks the first in-person Greg Davidson, co-chair of RETC ment and tunnel rehabilitation. meeting for the UCA, a Division of 2021. “People want to hear about fu- “It’s a very good forum for the SME, in more than a year. There will ture projects, TBMs and innovation so sharing of knowledge. The presenta- be some modifications to comply we have two sessions on innovation tions are very good and are a snapshot with COVID-19 pandemic protocols, which is good, we want to encourage into the paper,” said Davidson. “You but RETC 2021 will include a full innovation. People want to see new can look at the program and decided technical program, exhibit hall and ideas and we should be looking for what to listen to and dig into the pro- networking opportunities — all held new ideas.” ceedings in more depth.” face-to-face with appropriate health Technical sessions at RETC 2021 and safety measures. include 106 papers in sessions on con- RETC 2021: Health and safety Attendees will have the opport- tract practices, design, difficult ground, precautions and procedures tunity to learn about top-of-mind hard-rock TBMs and tunnels, design Additional health and safety pro- industry issues, trends and innovations build, ground control approaches and tocols will be implemented during to help their career trajectories. methods, health and safety and sus- RETC. There will be no onsite registration tainability, shafts and mining, ground All attendees are expected to com- available due to COVID-19 protocols. support and final lining, international However, the conference will fea- (continued on page 33)

AECOM expands tunneling expertise in Canada AECOM announced the addition all forms of tunnels and underground phase to final detail design — and on of two international tunnel experts to structures, including rail, transit and design-build projects. He has worked its Canadian tunneling practice. Ro- hydropower tunneling. He has worked in the United States, Canada, Austra- berto deMoraes, director of tunnels, in the United Kingdom, Australia, lia and , and is an expert in the and Mike Mains, senior tunnel design New Zealand, Brazil, Norway, Swe- use of large-diameter tunnel boring lead, have joined AECOM in the den, , Portugal, Turkey machines and the sequential excava- Metro Vancouver Regional District of and many other parts of the world. tion method in tunneling. His project British Columbia. His portfolio includes major projects experience includes several metro “The addition of Roberto and such as Metro Manila in the Philip- lines of the Grand Paris Express, Mike to our tunneling practice pines, the Dubai Storm Water Tunnel Saint-Maur-Creteil Station in France, strengthens our team’s ability to meet in the United Arab Emirates, the Follo WestConnex M4 East Highway in the growing demand for innovative Line Railway Tunnel in Norway and Australia, and the Hetch Hetchy Aq- solutions and the latest technologies the Devoll Hydropower in Albania. ueduct Rehabilitation in California. for tunneling and underground struc- deMoraes is a chartered engineering Mains is a licensed engineer in Brit- tures in cities across Canada,” said geologist in Brazil, a member of the ish Columbia and California. He is Nasri Munfah, AECOM’s director of International Society for Rock Me- a member of the French Tunnelling tunneling and underground engineer- chanics, and a Fellow of the Geologi- and Underground Space Associa- ing in the Americas. “In addition to cal Society of London, the Portuguese tion’s Underground Construction their skills, each brings broad inter- Geotechnical Society and the Institute and Sustainable Development work national expertise and best practices of Materials, Minerals, and Mining. group and has presented on the use of gained from working on major proj- Mains is a senior tunnel engineer mechanized tunnel boring machines ects across the globe.” with more than 10 years of interna- at several conferences and events, deMoraes is a geotechnical and tional experience. He supports public including the International Tunnelling tunneling engineer with more than 26 and private clients on all project and Underground Space Association years of international experience in stages — from initial concept and bid World Congress. n

28 june 2021 Tunneling & Underground Construction ® tuc& UCA of SME News Kimberly Martin joins Keller eller has announced the hire Engineering Sustainability, a journal of Kimberly Martin, Ph.D., published by the Institute of Civil En- KP.E., as senior engineer – in- gineers. Martin holds a B.S. in civil en- novation and sustainability. Martin gineering from the University of Ari- will focus on Keller’s initiatives zona, and an M.S. in geotechnical and toward environmental and societal geoenvironmental engineering from sustainability in North America and the University of Texas at Austin. She provide high-level innovative efforts recently completed her Ph.D. at Ari- within our engineering function. zona State University with a focus on With more than 13 years in the bio-inspired geotechnics and lifecycle geotechnical industry, Martin previ- sustainability within geotechnical ously worked at ExxonMobil as a engineering. In addition, Martin has lead geotechnical engineer on de- devoted much of her career to im- velopment projects across the globe. proving diversity and inclusion within Kimberly Martin She is the past chair of the Arizona the engineering community. Geo-Institute and is the Region 8 “The construction industry is ronmentally friendly materials and representative for the Geo-Institute’s well-positioned to benefit from infra- processes,” said Martin. “By offering Local Involvement Committee. Mar- structure renewal, urbanization and innovative products and solutions for tin also serves on the sustainability expanding cities. As the global cli- a sustainable future, Keller is proac- committees of the Geo-Institute and mate crisis worsens, we face the chal- tively leading the geotechnical sector. the Deep Foundations Institute. She lenges of cutting carbon emissions, For these reasons, I am excited and is a member of the editorial panel for limiting waste, and using more envi- proud to join the Keller team.” n Rapid Excavation and Tunneling Conference: 2021 proceedings Edited by Jarrett E. Carlson and is deemed “essential” infrastructure. Gregg W. Davidson 2021, 1248 pages The COVID-19 pandemic has Print or eBook Hardcover, 4 lbs $149 impacted each of us, personally and Member ISBN 978-0-87335-492-9 professionally, and while times have $129 Student Member Book Order been hard, we are fortunate to work No. 492-9 $219 Nonmember/List- in a field that is able to meet the chal- Save 25 percent on print and eBook lenge and thrive thereafter. Congrat- bundle. ulations are in order to everyone in Every two years, industry lead- our industry for keeping the planning ers and practitioners from around and development of projects moving the world gather at the Rapid Ex- forward and for maintaining safe and cavation and Tunneling Conference productive worksites in these chal- (RETC), the authoritative program lenging times. for the tunneling profession, to learn The Proceedings include chapters about the most recent advances and on: Contract practices, design, design/ breakthroughs in this unique field. build projects, difficult ground, future The information presented helps projects, geotechnical considerations, professionals keep pace with the ground control approaches and ever-changing and growing tunneling methods, ground support and final industry. lining, hard rock TBMs and tunnels, This book includes the full text health and safety & sustainability, of 106 papers presented at the 2021 international projects, large span conference. tunnels and caverns, microtunneling Though the tunneling industry ing professionals include adaptability, and trenchless, tunneling, new and in- continues to develop both techni- resiliency, optimism and management novative technologies, pressure face cally and contractually, one notable of change. These are traits that have tunneling, project planning and risk adaptation of the last two years has been recently put to an entirely new management, SEM applications and been the onset and management of challenge over the last year or so. We projects, shafts and mining and tun- COVID-19. The hallmarks of tunnel- have truly witnessed why what we do nel rehabilitation. n

Tunneling & Underground Construction june 2021 29 ® Obituary tuc& UCA of SME News

K.N. Murthy, April 4, 1943 - Feb. 21, 2021 In memoriam n Feb.21, 2021, the tunneling nector projects and the heavy rail Pur- industry lost K.N. Murthy, a ple Line Extension project on Wilshire Owell-known transportation Blvd. As an indicator of his role in the professional who had a pivotal role in underground industry’s greatest issues, Los Angeles, CA tunneling. “Murthy,” Murthy presented “Managing Risk as he was universally known, was not on LA Metro’s ” at the a pick-and-shovel tunneler, rather he UCA of SME 2013 Cutting Edge Con- was one whose career made Los An- ference in Seattle, WA. Murthy retired geles tunnels possible. from Metro in 2014 as those major Murthy was born April 4, 1943, tunnel projects in Los Angeles were one of six children in a small town just starting construction. near Bangalore, India. Even after his Murthy’s expertise led him to yet father’s death when he was 15, Murthy, another challenge when the Honolulu through his perseverance, graduated Authority for Rapid Transit (HART) from college with a Bachelor’s Degree sought his help to serve as the in- K.N. Murthy in . He obtained his terim chief executive officer (CEO) first job with a Bangalore engineering geles — including the gassy geologic and subsequently as an advisor to firm the day after his graduation and conditions had to mature before the Mayor Caldwell overseeing a 32-km later joined a contractor near Kolkota. Metro tunnels could be constructed (20-mile), $12 billion elevated transit When his friend Vijay Chandra moved in the high-risk areas of Los Angeles. system, the largest public Infrastruc- to the United States, he encouraged In response to ground conditions ture program in the history of Hawaii. Murthy to immigrate as well, and in and other tunneling problems, Metro Murthy held this role for over two 1970 Murthy moved to New York to engaged a three-member geotechni- years and afterward he assisted the look for work. He joined a small en- cal/tunneling panel to evaluate the new CEO and the mayor’s office for gineering firm, Bunny and Associates, feasibility of tunneling in Los Angeles. another year prior to retiring in 2019. before joining Parsons Brinkerhoff The 1995 report of this panel (the Former Los Angeles Deputy Quade & Douglas in 1973. In 1974, “Eisenstein Panel”) concluded that Mayor for Transportation, Jaime de la he moved to Atlanta, GA for the firm with modern tunneling technology, it Vega, shared upon learning of Mur- to work on the new heavy rail transit was reasonable to undertake tunneling thy’s death: system for the Metropolitan Area Re- in Los Angeles and recommended the “K.N. Murthy was an instrumental gional Transit Authority (MARTA). use of pressurized-face TBMs. Subse- partner and leader in advancing Los He worked on projects in the Atlanta quently, in 2005 an APTA peer review Angeles Mayor Antonio R. Villarai- area for 10 years. indicated it was safe to tunnel in the gosa’s ambitious transit expansion In 1983, Murthy began work on high-risk area. Ultimately, the federal agenda that began in 2005. Murthy’s the new rail system for one of the pre- ban on funding the tunneling project management and technical expertise decessor agencies to the Los Angeles was repealed and work continues to- helped restore public confidence County Metropolitan Transportation day on this much-anticipated mobility in Los Angeles Metro and he led a Authority (LA Metro). This project solution. Murthy advised key decision- resurgence of rail construction that was the heavy rail subway in Los An- makers throughout this effort. continues to this day. Murthy will be geles, then known as the Metro Red Murthy, working with the PB missed by all who knew and loved Line. team, was also involved in the City of him, but his legacy as one of the fa- After the non-tunneling-related Los Angeles East Central Interceptor thers of the Los Angeles’ modern rail methane gas explosion and fire that Sewer (ECIS) and North East Inter- network will live on forever.” occurred during construction of the ceptor Sewer (NEIS). In addition to his stellar career, Red Line in 1985 and the subsequent Murthy left Parsons Brinckerhoff K.N. Murthy is remembered for his freeze on federal funding for the in 2007 after 34 years to join the Los love of his family, his enjoyment of tunneling project along the planned Angeles Metro as the executive direc- good food and drink, his great knowl- alignment, Murthy worked with Met- tor of transit project delivery. In that edge of music — from the Indian ro to revise the Red Line alignment position, he oversaw all of Metro’s music of his youth, to Beethoven to to avoid the risk areas, completing the construction projects, including the jazz — and, his penchant for old mov- work in 1993 to define the approxi- environmental clearance and prelimi- ies, including “It’s A Wonderful Life” mately 29 km (18 miles) of subway. nary engineering for the next wave of every December. Murthy is survived Tunneling technology and political major tunnel projects in Los Angeles: by Padmini, his wife of 44 years, two acceptance of tunneling in Los An- light rail Crenshaw and Regional Con- sons and three grandchildren. n

30 june 2021 Tunneling & Underground Construction ® tuc& UCA of SME News UCA Working Groups provide new volunteer opportunities he UCA has launched 15 work- scope includes seismic planning, currently under development, with ing groups on key technical fo- design, construction, performance, Prof. Youssef Hashash and Carlos Tcus areas. These subcommittees maintenance and operation of tun- Jaramillo leading the effort. This syn- mirror the subject areas established nels and underground structures, sup- thesis aims to present an overview of by the International Tunnelling As- porting sub-systems, and interactions the current state of practice for the sociation (ITA) and aim to maximize with surrounding infrastructure. The seismic design and construction of benefit for UCA members by pro- consensus of the group members was tunnels and underground structures. viding clear input on U.S. needs and to focus on three initial activities. The information is intended to perspectives. In this issue, and future provide owners, designers and con- issues of T&UC, ITA and UCA 1. Develop a synthesis of cur- tractors with a resource to develop Working Groups will be featured. rent seismic practice and guidance and methods for new proj- guidelines. ects and retrofit existing underground Working Group 9: 2. Prepare a document on systems. The synthesis will draw Working Group 9, Seismic De- performance-based seismic information from literature, personal sign and Construction for Tunnels design for tunnels and under- experiences and a survey of current and Underground Structures, was ground structures. public agencies’ practices within the established in the fall of 2020, and 3. Identify and create a list of United States and other countries. the group is meeting quarterly. Cur- knowledge gaps/emerging Past and current design approaches, rently, there are 12 active members technologies specific to seis- analysis and practice will be and one ad hoc member in the group mic performance. documented and critically analyzed, representing the public sector, en- and knowledge gaps will be identified gineering, consulting and academic The synthesis document was se- to provide future research directions. communities. The working group’s lected as the highest priority and is Design case histories where seis- mic evaluations and designs have been employed on projects will be Working Subject matter for research U.S. contact Group documented and supplemented from interviews with knowledgeable indi- WG 2 Research William Hansmire viduals from both the public and pri- WG 3 Contractual practices in underground William Edgerton vate sectors. A summary of selected construction performance case histories of under- WG 5 Health and safety in works Robert Labbe ground structures that experienced seismic shaking will be included. WG 6 Maintenance and repair of underground Henry Russell structures Publication of the document is tar- geted for June 2020. WG 9 Seismic effects Conrad Felice If you would like additional in- WG 11 Immersed and floating Christian Ingerslev formation on the working group or tunnels would like to become a member, WG 12 Sprayed concrete use Grover Vargas please contact Conrad Felice at con- [email protected]. WG 14 Mechanization of excavation Brian Fulcher WG 15 Underground and environment Kamran Bakhsh ITA Working Group 14 The goal of the UCA of SME WG 17 Long tunnels at great depth Lok Home/Brad Grothen Working Group 14 – Mechanized Tunnelling, is to further develop an WG 19 Conventional tunneling Nasri Munfah intensive knowledge base for plan- WG 20 Urban problems – underground Sanja Zlatanic ners, designers, contractors and solutions equipment and service providers. WG 21 Life cycle asset management Jim Brady Mechanized tunneling in this context WG 22 Information Modeling in Tunneling Vojtech Gall Jr. generally includes all forms of ma- chine excavated and supported tun- WG 23 Design and construction of shafts Verya Nasri nels and caverns with the exclusion of Young Member ITA Young Member Group Vojtech Gall Jr. (continued on page 32)

Tunneling & Underground Construction june 2021 31 ® tuc& UCA of SME News UCA Working Groups (continued from page 31) and solutions. frequently refer- • Further develop narrative and enced in tunnel- the drill and blast and SEM tunneling data summaries (linked to ling journals and (UCA WG 19 – Conventional Tun- 2019 publication). technical pub- neling). Based on the ITA charter for • Publish target date – late 2021. lications. Quick WG 14; access to these “WG14 is to promote mechanized Additional attention and special- publications tunneling and to inform about the ized focus have commenced on future can be achieved current state of development in this publications dedicated to specific through; flexible technology. It shall support mechanized tunnelling technologies public and private clients, planners Handling, related to improvement in efficiencies, and contractors with general and Treatment and safety, communications and wear de- technical information during the Disposal of Tun- tection issues. preparation for tunnelling projects.” nel Spoil Materi- als, 2019, Author Summary ITA Working Group participa- UCA WG 14 involvement with Working Group tion. UCA WG 14 supports the ITA the ITA and the global tunneling in- 14 and 15 WG 14 – Mechanized Tunnelling. Our Recommen- dustry provides a unique portal to ac- group (both ITA and UCA affiliates) dations on the cess developments and technological is composed of representatives from Development improvements that also makes sure owners, designers, contractors, sub- Process for that information flows from the U.S. contractors as well as equipment and to other countries. Current member- Mined Tunnels, material manufacturers and, there- ship in the UCA Working Group in- 2016, Author fore, represent a highly diverse cross- cludes persons working in the design, Working Group 14 and 19 section from the global tunnelling contracting and equipment manufac- industry. All group participants are turing sectors. Additional members WG 14 has been active in devel- volunteers and share a common goal are actively being sought to expand oping two concurrent publications of making contributions and seeking the UCA WG to contribute to pres- with input from volunteers from betterments to the tunneling and un- ent and future publications. around the globe including the United derground construction industry. Over States. It is intended that these publi- the past several years this Working cations will be completed at the end Working Group 22 Group has developed collaborative The goal of the UCA of SME of 2021 in advance of WTC 2022 in relationships with other established Working Group 22 “Information April in . Working Groups and has placed a Modeling in Tunneling” is to develop special emphasis (dedication) on and support best Building Infor- TBM Guide Specifications the engagement of young members. mation Modeling (BIM) practices • Preparing a guideline for the Accordingly, all current and future within the tunneling industry. As the development of TBM speci- activities and publications will have name indicates, the UCA WG 22 sup- fications in soft ground and substantial involvement (and owner- ports the ITA WG 22 “Information hard rock. The work is pro- ship) from young members. Modeling in Tunneling” in achieving gressing under an expanded this goal. We are composed of repre- participant base. ITA Working Group Leadership. sentatives from both designers and • Complete current narrative Within the ITA organization, Work- contractors and therefore represent and data summaries. ing Group 14 is under the leadership a diverse view of how BIM is used in • Publish target date – late 2021. of Brian Fulcher, Animateur; Karin the modern tunneling industry. Bäppler, Vice Animateur and Soren Our close relationship with the TBM Tunnel Spoil Processing, Eskesen, Tutor. ITA allows information and knowl- Treatment and Disposal edge to flow in two directions. In one • Expanding on a prior com- Recent Working Group Publi- direction, our WG aims to benefit pleted major work product cations. The ITA Working Group from international experience in (2019 by WG 14+15) related has been active in recent years in using methods or technology that to the handling, treatment completing several comprehensive have not yet become widespread in and disposal options of tunnel publications intended for the global the U.S. tunneling industry. In do- spoil material. This is an im- tunneling industry. These documents ing so, our WG specifically focuses portant global topic needing have also been very well received in considerably more attention the U.S. tunneling industry and are (continued on page 33)

32 june 2021 Tunneling & Underground Construction ® tuc& UCA of SME News DFI announces new chair and scholarships eep Foundations Institute including ultrasonic shaft profiling. (DFI) announces Jon Sin- While coordinating UF research at Dnreich, P.E., of Load Test the Powell Structures and Materi- Consulting as the new chair of its als Lab, he oversaw projects dealing Seismic and Lateral Loads Commit- with wind engineering and natural tee. He takes the helm from Kwabena hazards. Sinnreich is a registered Ofori-Awuah, P.E., D.GE, ENV SP, of professional engineer in and Koforia. current chair of ASTM Subcommit- Sinnreich earned a bachelor’s tee D18.23 (Field Instrumentation degree in civil engineering and a Subcommittee under D18 Soil and master’s degree in structural engi- Rock). He is also active in DFI as neering at the University of Florida an editorial board member for DFI Jon Sinnreich (UF), and previously worked for Journal, and serves on multiple tech- Fugro Loadtest. He has participated nical committees. construction as well as related con- in hundreds of international bi-di- The DFI Seismic and Lateral cerns of other lateral load issues that rectional test projects and led R&D Loads Committee focuses on the apply in marine applications, ice and efforts on various technologies, unique issues of seismic design and regions. n UCA Working Groups (continued from page 32) flows from the U.S. to other countries. aims to ensure that any attempt at on the development of new project Our group members are currently ac- international standardization of infor- organization methods that employ tively engaged in the development of mation flows allows enough flexibility novel software to increase project ef- BIM guidelines for bored tunneling to account for unique U.S. contracting ficiency and to improve information projects within the ITA, and we ac- practices or other aspects of the U.S. exchange within a tunneling project. tively work to promote U.S. interests industry. In this way we are not only Several countries already require, as in their development. For example, making sure that our national indus- a standard, that BIM methodologies in the United States we employ sev- try is internationally heard but are are used within the tunneling indus- eral different contracting techniques doing our part to introduce unique try. The UCA of SME WG 22 aims to (design-build, progressive design viewpoints and approaches to the in- learn from these regulations to bring build, contract management at risk, ternational tunneling community. the best BIM practices back to the etc.) that may not be widely adopted Whichever way the information United States and to our diverse as- in all countries. Such contracting flows, we at the UCA WG 22 look sortment of owners, contractors, and techniques intrinsically affect infor- forward to continued work with our consultants. mation flow within a project, and who international colleagues to promote Our involvement with the ITA is responsible for what information BIM and its continued adoption also makes sure that information at what stage. Our group therefore within our industry. n RETC: UCA returns to in person conferences

(continued from page 28) livered to their hotel room or will be contact tracing. While networking is ply with current venue, local, county, mailed their name badge. The venue highly encouraged, social distancing state and federal guidelines. Complete is adhering to strict protocols to clean guidelines will be followed in session and updated health and safety mea- and sanitize the property. For details, rooms, at meal functions and in the sures can be found online. visit: https://www.caesars.com/health- Exhibit Hall. Before arriving at Caesars Palace and-safety. The venue will not provide pens in Las Vegas, attendees should review During RETC, all attendees must and pads in session rooms and RETC terms and conditions that must be ac- wear a face covering regardless of vac- will limit the distribution of printed cepted during regisitration. cination status. materials. Please plan to bring your To avoid congestion, please regis- Health self-assessments will be own pen and notebook and download ter in advance. RETC will offer only required to enter the meeting space. the conference app. badge changes at registration. All at- You may be subject to a temperature If you are not feeling well while at- tendees must be registered in advance screening and may be required to scan tending RETC, medical personnel will and will have their name badge de- your badge upon entry to assist with be available for assistance. n

Tunneling & Underground Construction june 2021 33 ® Tunnel Demand tuc& Forecast

Compiled by Jonathan Klug, David R. Klug & Associates

TUNNEL NAME OWNER LOCATION STATE TUNNEL LENGTH WIDTH BID USE (FEET) (FEET) YEAR STATUS Gateway Tunnel Amtrak Newark NJ Subway 14,600 24.5 2022 Awaiting funding 2nd Ave. Phase 2 NYC-MTA New York NY Subway 16,000 20 2021 Under design 2nd Ave. Phase 3-4 NYC-MTA New York NY Subway 89,600 20 2022-27 Under study Kensico-Eastview NYC-DEP New York NY Water 10,500 27 2024 Under study Connection Tunnel Flushing Bay CSO NYC_DEP New York NY CSO 13,200 20 2026 Under study Cross Harbor Freight NYC Reg. Develop. New York NY Rail 25,000 30 2022 Under study Tunnel Authority Metro Tunnel Boston MRWA Boston MA Water 23,760 10 2027 Under study Program - Northern Metro Tunnel Boston MRWA Boston MA CSO 50,160 10 2028 Under study Program - Southern Silver Line Extension Boston Transit Boston MA Subway 8,400 22 2024 Under design Authority Narragansett Bay Narragansett Bay Providence RI CSO CBNA- CSO Phase III - Commission Barletta JV Pawtucket Tunnel 13,000 28 2020 Awarded Conveyance Tunnel 8,800 10 2024 Under design Amtrak B&P Tunnel Amtrak Baltimore MD Rail 40,000 32 2021 Awaiting funding Alex Renew Long- City of Alexendria Alexandria VA CSO 10,500 20 2019 Traylor-Shea Term Control Plan JV awarded Potomac River CSO DC Water and Sewer Washington DC CSO 24,000 18 2022 Under design Tunnel Authority Superconducting TNEM/BWRR Washington DC Rail 146,520 43 2021 Under design Maglev Project - Northeast Corridor Lower Olentangy City of Columbus Columbus OH Sewer 17,000 12 2020 Granite Const. Tunnel low bidder Alum Creek Relief City of Columbus Columbus OH Sewer Tunnel Phase 1 30,000 18 2019 Under design Phase 2 21,000 14 2020 Under design Shoreline Storage NEORSD Cleveland OH CSO 16,100 21 2021 McNally- Tunnel Kiewit low bid Shoreline NEORSD Cleveland OH CSO 11,700 9.5 2021 Under design Consolidation Tunnel Southerly Storage NEORSD Cleveland OH CSO 18,350 23 2024 Under design Tunnel Big Creek Storage NEORSD Cleveland OH CSO 22.450 18 2029 Under design

Enbridge Line 5 Enbridge Traverse City MI Oil 23,760 12 2020 Contractor Tunnel selected - delayed Minneapolis Central City of Minneapolis Minneapolis MN CSO 4,200 10-19 2021 Bid date Q2 City Parallel Tunnel 2021 To have your major tunnel project added to the Tunnel Demand Forecast, or to update information on a listed project, please contact Jonathan Klug at [email protected].

34 june 2021 Tunneling & Underground Construction ® Tunnel Demand tuc& Forecast

TUNNEL LENGTH WIDTH BID TUNNEL NAME OWNER LOCATION STATE STATUS USE (FEET) (FEET) YEAR ALCOSAN CSO Allegheny Co. Pittsburgh PA CSO Ohio River Sanitary Authority 10,000 14 2023 Under design Allegheny River 41,700 14 2027 Under design Mononghahela River 53,900 14 2030 Under design I-70 Floyd Hill Colorado Dept. of Denver CO Highway 15,840 60 x 25 2022 Under design Highway Tunnel Transportation Stormwater Control Harris Co. Flood Houston TX CSO 52,800 25-40 2021 Under design Program Control District Mill Creek Trunk City of Nashville Nashville TN CSO 13,800 10 2023 Under design Improvements D2 Subway - 2nd Dallas Area Rapid Dallas TX Highway 3,000 22 2020 Under design Light Rail Alignment Transit West Seattle to Sound Transit Seattle WA Transit 10,500 18 2024 Under design Ballard Extension LA Metro Speulvada Los Angeles MTA Los Angeles CA High/Trans. 55,500 60 2020 LOI received Pass Corridor Folsom Area Storm SFPUC San Francisco CA CSO 4,000 12 2022 Under design Water Improvement BART Silicon Valley Santa Clara Valley San Jose CA Subway 26,400 56 2021 Under design Phase 2 Tunnel Transit Authority California Waterfix 1 Delta Conveyance Sacramento CA Water 39,905 28 2020 Delayed California Waterfix 2 Design and Const. 403,400 40 2020 Delayed Yonge St. Extension Toronto Transit Toronto ON Subway 15,000 18 2022 Under design Massey Tunnel City of Toronto Toronto ON CSO 20,000 18 2022 Under design Inner Harbour West City of Toronto Toronto ON CSO 18,400 19 2022 Under design Scarborough Rapid Toronto Transit Toronto ON Subway 25,000 18 2018 Strabag low bidder Transit Extension Commission Elington Crosstown Toronto Transit Toronto ON Subway 40,000 18 2020 West End West Extension Commission Contractors low bid Ontario Line North Toronto Transit Toronto ON Subway 29,500 20 2022 Under design Extension Commission Ontario Line South Toronto Transit Toronto ON Subway 29,500 20 2021 Shortlist announced Extension Commission Blue Line Extension Societe de transport Montreal QC Subway 19,000 20 2021 Under design de Montreal LRT City of Calgary Calgary AB Transit 26,250 20 2021 RFQ submitted Nose Hill Project City of Calgary Calgary AB CSO 10,800 10 2020 Under design Annacis Water Supply City of Vancouver Vancouver BC Water 7,500 15 2021 RFQ requested Metro Vancouver Vancouver BC Subway 18,700 18 2020 Acciona/Ghella JV Broadway Extenstion awarded Eagle Mt. Pipeline Fortic BC Woodfibre Vancouver BC Oil 29,500 13 2020 Short list announced

Stanley Park Water City of Vancouver Vancouver BC Water 5,000 15 2021 Under design Supply Tunnel

Tunneling & Underground Construction june 2021 35 ® tuc& CLASSIFIEDS

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36 JUNE 2021 Tunneling & Underground Construction

howGuide RETCS

ABC Industries ...... 9 Howden North America, Inc...... 22 Northwest Labroers-Employees Antraquip Corporation...... 11 Innovative Wireless Technology, Inc...... 24 Training Trust Fund...... 36 Brookville...... 13 J.H. Fletcher ...... 25 Parsons ...... 39 CDM Smith...... 13 Jennmar...... 27 Sika ...... 41 Daigh...... 15 Keller...... Outside Back Cover SME RETC Schedule...... 3 David R. Klug & Assoc, Inc...... 16 Kelley Engineering Equipment...... 26 SoilFreeze...... 43 Derrick Equipment...... 17 MAPEI...... 29 Strata Products Worldwide...... 45 Dr. Sauer & Partners Corp...... 14 Master Builder Solutions US, Inc...... 31 The Robbins Company...... 47 Drill Tech Drilling and Shoring, Inc...... 18 McMillan Jacobs Associates ...... 30 Trinity Products...... 38 DSI Underground...... 19 Michels Corporation...... 32 UCA...... 51 Down For That...... 42 Miller Contracting...... 33 VMT Technical Measurement Epiroc...... 21 Mining Equipment Ltd...... 34 Solutions, Inc...... 40 Gall Zeidler Consulting...... 20 Naylor Pipe Company...... 35 HNTB...... 23 Normet...... 37 Reconnect at RETC Find solutions to common project challenges and case studies presented only at RETC.

SCHEDULE-AT-A-GLANCE Current 5/10/2021. Find updates at retc.org

SUNDAY, JUNE 13 WEDNESDAY, JUNE 16 8:00 am - 11:00 am Short Course | DRB Training: Dispute Boards for 7:30 am - 12:00 pm RETC Information Desk Open Get ready to RECONNECT Projects Using Alternative Delivery Methods (ticketed) 7:30 am - 10:30 am Speaker Ready Room 10:00 am - 11:00 am RETC Executive Committee Meeting 7:30 am - 8:30 am Authors’ Coffee with tunneling professionals at the fi rst 11:00 am - 12:00 pm RETC International Committee Meeting 8:30 am - 11:30 am Technical Sessions 1:00 pm - 4:00 pm Workshop | Panel Session: The State of the Dispute 9:00 am - 12:00 pm Exhibit Hall Open Resolution Boards in the Tunnel Industry tunneling event of 2021, RETC! (The Good, the Bad and the Ugly) 9:00 am - 11:00 am UCA Executive Committee Orientation 3:00 pm - 4:30 pm Cutting Edge 2021 Organizing Committee Meeting 9:30 am - 11:30 am NAT 2022 Organizing Committee Meeting 5:00 pm - 6:30 pm UCA Corporate/Sustaining Members Reception 11:30 am - 2:00 pm UCA Executive Committee Meeting (by invitation only) RE-FOCUS RE-CHARGE RE-EMERGE 6:00 pm - 8:00 pm Women in Tunneling Reception SUNDAY, JUNE 13 Find solutions to common project Break away from the Zoom Find fresh ideas and strategies 7:00 pm - 7:30 pm UCA Mentor Orientation 8:00 am Short Course | DRB Training: Dispute Boards for Projects challenges and case studies fatigue of the last year to network, to implement that will positively 7:30 pm - 8:00 pm UCA Mentor/Mentee Meeting Place Using Alternative Delivery Methods (ticketed) presented only at RETC. engage and re-ignite your passion affect your bottom line, and your 8:00 pm - 9:00 pm UCA Young Members Scholarship Orientation 1:00 pm Workshop| The State of Dispute Resolution Boards in for tunneling. perspective! the Tunnel Industry (The Good, the Bad and the Ugly) MONDAY, JUNE 14 Register and book your room at retc.org 7:00 am - 8:30 am RETC Scholarship Recipients Breakfast MONDAY, JUNE 14 7:30 am - 5:00 pm RETC Information Desk Open 8:30 am • Contract Practices 7:30 am - 3:00 pm Speaker Ready Room • Design • Diffi cult Ground TECHNICAL PROGRAM 7:30 am - 8:30 am Authors’ Coffee • Hard Rock TBMs and Tunnels 8:00 am - 3:00 pm Exhibitor Move-in 1:30 pm • Design Build Projects 8:30 am - 11:30 am Technical Sessions • Ground Control Approaches and Methods SUNDAY, JUNE 13 MONDAY, JUNE 14 TUESDAY, JUNE 15 11:30 am - 1:00 pm Welcoming Luncheon (ticketed) • Health & Safety and Sustainability • Shafts and Mining 8:00 – 11:00 am 8:30 am 8:30 am Sponsored by J.F. Shea • Short Course • Contract Practices • Ground Support and Final Lining 1:30 pm - 5:00 pm Technical Sessions DRB Training: Dispute Boards • Design • International Projects 4:00 pm - 5:00 pm George Fox Committee Meeting TUESDAY, JUNE 15 for Projects Using Alternative • Diffi cult Ground • Large Span Tunnels and Caverns 5:00 pm - 7:00 pm Exhibit Hall Hosted Reception 8:30 am • Ground Support and Final Lining • International Projects Delivery Methods • Hard Rock TBMs and Tunnels • New and Innovative Technologies I 8:00 pm - 10:30 pm UCAYM Networking Event (offsite location) • Large Span Tunnels and Caverns $150 Member 1:30 pm 1:30 pm • New and Innovative Technologies I $250 Nonmember • Design Build Projects • Future Projects TUESDAY, JUNE 15 1:30 pm • Future Projects • New and Innovative Technologies II • Ground Control Approaches • New and Innovative Technologies II 7:00 am - 8:30 am UCA Breakfast (ticketed) 1:00 pm • Pressurized Face Tunneling and Methods • Pressurized Face Tunneling 7:30 am - 5:00 pm RETC Information Desk Open • SEM Applications and Projects • The State of Dispute Resolution • Health & Safety and Sustainability • SEM Applications and Projects 7:30 am - 3:00 pm Speaker Ready Room Boards in the Tunnel Industry • Shafts and Mining (The Good, the Bad and the Ugly) WEDNESDAY, JUNE 16 7:30 am - 8:30 am Authors’ Coffee WEDNESDAY, JUNE 16 8:30 am 8:30 am - 11:30 am Technical Sessions 8:30 am • Geotechnical Considerations • Geotechnical Considerations 11:00 am - 2:00 pm Exhibit Hall Open • Microtunneling & Trenchless Tunneling • Microtunneling & Trenchless Tunneling 11:30 am - 1:00 pm Luncheon in Exhibit Hall • Project Planning and Risk Management Learn more about the program and speakers at retc.org • Tunnel Rehabilitation • Project Planning and Risk 1:30 pm - 5:00 pm Technical Sessions Management 4:00 pm - 7:00 pm Exhibit Hall Hosted Reception • Tunnel Rehabilitation Reconnect at RETC Find solutions to common project challenges and case studies presented only at RETC.

SCHEDULE-AT-A-GLANCE Current 5/10/2021. Find updates at retc.org

SUNDAY, JUNE 13 WEDNESDAY, JUNE 16 8:00 am - 11:00 am Short Course | DRB Training: Dispute Boards for 7:30 am - 12:00 pm RETC Information Desk Open Projects Using Alternative Delivery Methods (ticketed) 7:30 am - 10:30 am Speaker Ready Room 10:00 am - 11:00 am RETC Executive Committee Meeting 7:30 am - 8:30 am Authors’ Coffee 11:00 am - 12:00 pm RETC International Committee Meeting 8:30 am - 11:30 am Technical Sessions 1:00 pm - 4:00 pm Workshop | Panel Session: The State of the Dispute 9:00 am - 12:00 pm Exhibit Hall Open Resolution Boards in the Tunnel Industry (The Good, the Bad and the Ugly) 9:00 am - 11:00 am UCA Executive Committee Orientation 3:00 pm - 4:30 pm Cutting Edge 2021 Organizing Committee Meeting 9:30 am - 11:30 am NAT 2022 Organizing Committee Meeting 5:00 pm - 6:30 pm UCA Corporate/Sustaining Members Reception 11:30 am - 2:00 pm UCA Executive Committee Meeting (by invitation only) 6:00 pm - 8:00 pm Women in Tunneling Reception SUNDAY, JUNE 13 7:00 pm - 7:30 pm UCA Mentor Orientation 8:00 am Short Course | DRB Training: Dispute Boards for Projects 7:30 pm - 8:00 pm UCA Mentor/Mentee Meeting Place Using Alternative Delivery Methods (ticketed) 8:00 pm - 9:00 pm UCA Young Members Scholarship Orientation 1:00 pm Workshop| The State of Dispute Resolution Boards in the Tunnel Industry (The Good, the Bad and the Ugly) MONDAY, JUNE 14 7:00 am - 8:30 am RETC Scholarship Recipients Breakfast MONDAY, JUNE 14 7:30 am - 5:00 pm RETC Information Desk Open 8:30 am • Contract Practices 7:30 am - 3:00 pm Speaker Ready Room • Design • Diffi cult Ground 7:30 am - 8:30 am Authors’ Coffee • Hard Rock TBMs and Tunnels 8:00 am - 3:00 pm Exhibitor Move-in 1:30 pm • Design Build Projects 8:30 am - 11:30 am Technical Sessions • Ground Control Approaches and Methods 11:30 am - 1:00 pm Welcoming Luncheon (ticketed) • Health & Safety and Sustainability Sponsored by J.F. Shea • Shafts and Mining 1:30 pm - 5:00 pm Technical Sessions 4:00 pm - 5:00 pm George Fox Committee Meeting TUESDAY, JUNE 15 5:00 pm - 7:00 pm Exhibit Hall Hosted Reception 8:30 am • Ground Support and Final Lining • International Projects 8:00 pm - 10:30 pm UCAYM Networking Event (offsite location) • Large Span Tunnels and Caverns • New and Innovative Technologies I TUESDAY, JUNE 15 1:30 pm • Future Projects • New and Innovative Technologies II 7:00 am - 8:30 am UCA Breakfast (ticketed) • Pressurized Face Tunneling 7:30 am - 5:00 pm RETC Information Desk Open • SEM Applications and Projects 7:30 am - 3:00 pm Speaker Ready Room 7:30 am - 8:30 am Authors’ Coffee WEDNESDAY, JUNE 16 8:30 am - 11:30 am Technical Sessions 8:30 am • Geotechnical Considerations 11:00 am - 2:00 pm Exhibit Hall Open • Microtunneling & Trenchless Tunneling 11:30 am - 1:00 pm Luncheon in Exhibit Hall • Project Planning and Risk Management • Tunnel Rehabilitation 1:30 pm - 5:00 pm Technical Sessions 4:00 pm - 7:00 pm Exhibit Hall Hosted Reception Level 3 - Octavius Ballroom

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4 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 floorplan - augustus

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SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 5 sponsor listing

GOLD

Herrenknecht Traylor Bros., Inc. Gold Sponsor Lanyards Herrenknecht is a technology and market leader in the area of mechanized tunnelling Traylor Bros., Inc. (TBI) is a family-owned corporation founded in 1946. For more systems. As the only company worldwide, Herrenknecht delivers cutting-edge tunnel than 75 years, TBI has provided single-source, comprehensive, cutting-edge boring machines for all ground conditions and in all diameters – ranging from 0.10 to construction and design-build services to public works agencies throughout 19 meters. The Herrenknecht product range includes tailor-made machines for trans- North America. The tremendous depth of experience in our engineering and port tunnels (Traffic Tunnelling) and supply and disposal tunnels (Utility Tunnelling). management staff, together with our highly experienced field personnel, has Furthermore, Herrenknecht supplies an entire range of innovative machines for the allowed TBI to develop some of the most innovative construction solutions in mechanized construction of underground mining infrastructures. The company also the industry. Our array of services includes tunnels and other underground produces state-of-the-art deep drilling rigs that drill down to depths of 8,000m and structures, bridges, locks and dams, ports and wharfs, and mine development, plants for the exploration of shallow geothermal energy. as well as equipment support. Visit us at www.traylor.com.

Jacobs RETC Mobile App Skanska Jacobs brings extensive design and experience to all types of tunnels projects, including: highways, transit/railroad, water and wastewater sys- RETC Proceedings Sponsor Skanska USA is one of the largest, most financially sound construction and tems. We have successfully delivered the design of some of the most challenging development companies in the U.S., serving a broad range of clients including recent design-build/P3 tunnel projects in the U.S., such as the Port of Miami Tunnel those in transportation, power, industrial, water/wastewater, healthcare, educa- project in Florida, the Blue Plains Tunnel in Washington D.C. and the Ohio River Bridge tion, sports, data centers, government, aviation, life sciences and commercial. East End Crossing Tunnel in Louisville, Kentucky. Throughout the 31 metropolitan areas where it works, Skanska has extensive tunneling and complex underground experience and expertise in support of a With a talent force of more than 50,000, Jacobs provides a full spectrum of ser- variety of infrastructure sectors. vices including technical, professional and construction/program-management for business, industrial, commercial, government and infrastructure sectors. For more information, please visit www.jacobs.com.

JENNMAR Civil WiFi Jay Dee Contractors, Inc. JENNMAR has been an innovative leader in ground control for the mining industry Monday Exhibit Hall Hosted Reception for more than forty years. Over the past decade, the success of our products and Exclusive Sponsor engineering solutions has led us, quite naturally, into tunneling applications as well. Jay Dee Contractors, Inc. has been delivering quality and innovative underground We’ve made key acquisitions of people and equipment to further enhance our deep construction since 1965. Our team is comprised of experienced and dedicated commitment to serve the tunneling industry. industry professionals, and our commitment to quality is evident in everything we do. We continue to build upon our reputation of excellence by delivering Our primary product roster includes M3® expandable rock bolts, FRICTION-LOK® innovative, quality and reliable underground tunneling projects including: Soft stabilizer systems, Fast Anchors™ DCP Bolts, steel sets, steel tunnel ribs & shaft Ground, Hard Rock and Pressurized Face Tunneling, Tunnel Rehabilitation, Shaft rings, lattice girders, rail ties, resins and with our alliance partners, Contech, we also Excavations, and Concrete Structures. Our work underground makes the surface provide 2-flange liner plate. world more livable.

6 2021 RETC ShowGuideR SHOWGUIDE exhibitor listings as of May 05, 2021 sponsor listing

SILVER

Keller Company Kiewit Master Builder Solutions Silver Sponsor Coffee Break Sponsor Coffee Break Sponsor Facing challenging subsurface conditions is a familiar For more than 60 years, Kiewit has built some of the Through its Master Builders Solutions brand, BASF scenario for tunneling contractors, and as the leading most complex tunneling and underground projects in is a leading supplier of underground construction geotechnical specialty contractor, Keller has provided North America. We have the capabilities to self-per- solutions that help tunneling customers to become solutions to these challenges for almost 100 years. form soft ground and hard rock TBM tunneling, along more successful, even in highly challenging ground Our solutions for tunneling include diaphragm walls, with conventional tunneling techniques such as Drill conditions. BASF has the largest range of products ground freezing, secant piles, dewatering, jet, perme- and Blast, and SEM. At the heart of these projects and services available to meet needs and solve problems in TBM and conventional tunneling, whether ation and compensation grouting, and instrumentation is a workforce dedicated to industry-leading safety in soft ground or hard rock conditions. We offer a full and monitoring. performance and unmatched quality excellence. range of MasterRoc® tunneling products such as soil From the unique, complex projects we build, to the conditioning foams and polymers, anti-clay agents, By connecting global resources and expertise with committed professionals who design, engineer and tail sealants, anti-abrasion agents, dust suppressants, local knowledge and focus, Keller develops innovative, construct them, Kiewit ensures the ordinary is always bearing seal greases, EP2 greases and annulus grouts, practical, and cost-effective solutions to geotechnical extraordinary. plus product for sprayed concrete and injection for challenges. Keller builds projects designed by others Kiewit Infrastructure Co. ground consolidation. and offers full design-build services for any geotechni- Underground District cal construction application. 1550 Mike Fahey St, 3rd Floor Hatch Omaha, NE 68102 Women in Tunneling Reception, Barnard Construction 402-342-2052 Technical Presentations Sponsor Coffee Break Sponsor Hatch is an award-winning, multidisciplinary People building for People. That’s what we do at MAPEI Corp professional services firm that delivers an array of Barnard. Whether we’re raising a dam in , con- Coffee Break Sponsor technical and strategic services, including consulting, structing a reservoir in Florida, tunneling under down- MAPEIs Underground Tunneling Technology (UTT) engineering, and project and construction manage- town San Francisco, redirecting a river while building category offers a complete line of products and as- ment to the infrastructure, energy, and mining sectors. a complex hydropower plant in northern Manitoba, or Hatch has served clients for over six decades with sociated technologies for use in and on underground strengthening and improving the integrity of a natural experience in more than 150 countries. With over construction projects, including shotcrete accelerators gas pipeline in a Sacramento suburb, our people arrive 10,000 staff in more than 65 offices globally, Hatch and admixtures for concrete, as well as products for at our projects with a determination to do the best has more than $35 billion in projects currently under injection and consolidation, mechanized tunneling for their communities and be the best in the industry. management. Our recent merger with LTK Engineer- (TBM), engineering and soil stabilization, coating and Our work also encompasses power transmission, ing Services means we can now offer a full suite of protection, maintenance, repair and waterproofing. marine, water and sewer pipeline, and environmental engineering services to transit agencies across North construction. Most often our projects include several America in addition to our extensive tunnel work that includes stations, track, vehicles, and systems. Hatch of these elements. They always present a challenge. The Walsh Group has participated in the design/delivery of complex They affect our neighbors as well as our families. We Technical Program Sponsor tunnel and transit projects such as Scarborough live where we work, so we come to know our projects Founded in 1898, The Walsh Group is a fourth-gener- Subway Extension, LA Metro’s Regional Connector, Mid personally. We build for People. ation family-owned business providing design, build, Halton Outfall, Ashbridge Bay Outfall, Calgary Transit finance and operation for a wide variety of construc- Green Line, Sound Transit Link Light Rail, Denver RTD HNTB tion projects. We are consistently listed among the FasTracks, and MBTA Green Line. Technical Presentations Sponsor largest contractor in the United States, operating out of 21 strategically located regional offices across North With 3800 professionals, HNTB is a leader in providing IPC – Bothar Group of America. Our three companies are united by a shared solutions to infrastructure problems nationwide. The dedication to exceptional customer service, while firm has a long history in design and engineering ser- Companies upholding the highest standards of ethics, quality and vices for tunnels and underground construction. HNTB Silver Sponsor safety. has completed award-winning projects on some of the IPC is an industry leader in trenchless underground countrys most complex projects, including highway, construction with over 30 years of international transit, rail, aviation and water resources. HNTB’s ex- J.F. Shea Construction, Inc. experience. perts have the insight and knowledge to provide state RETC Welcome Lunch With focus on safety and quality, we are BUILDING THE of the art innovative solutions to tunneling challenges, WORLD BENEATH YOU while taking care of our people from small diameter excavations to designing the Exclusive Sponsor J.F. Shea Construction, Inc. has been involved in and providing exceptional service to our clients and largest bored tunnel in the world (Alaskan Way Tun- development of American Infrastructure since 1881. the public. Our commitment to the environment en- nel)-- utilizing both conventional tunneling methods Shea’s storied past includes immense projects such sures a maximum reduction in environmental footprint. (sequential excavation) or mechanized tunneling for as Hoover Dam, Golden Gate Bridge and the Interstate IPC provides a wide range of cutting-edge technology variety of ground conditions. and underground construction solutions from Micro- Highway system. Today Shea’s experience spans 140 tunnelling, to complete trenchless installation in urban years in American Tunnel Construction, Water Treat- and environmentally sensitive areas. Our solutions ment and Conveyance and Bridge Construction. As a and technologies are adaptive to complex geological fourth-generation family-owned tunnel and heavy civil conditions providing superior value and services to our construction firm our team has the requisite person- clients across various industries. nel, financial strength, bonding capacity, insurability, and safety experience to successfully complete each Project to demanding requirements

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 7 sponsor listing

BRONZE

BabEng, LLC LOVSUNS Tunneling Brookville Equipment Women in Tunneling Reception Canada Ltd. Corporation BabEng specializes in mechanized tunneling and un- derground storage construction. The world-wide ser- Mobile App Ad Bronze Sponsor vices range from project development and design to Lovsuns is a LNSS company that acquired the entire Brookville Equipment Corporation (BROOKVILLE) is an construction management and practical work process assets of Caterpillar Tunneling Canada Corp. (formerly American designer and builder of rail-mounted loco- optimization. Another successful service being offered known as LOVAT) in 2014. Lovsuns continues to build motives, personnel carriers, and specialty equipment is hands-on troubleshooting on-site for TBMs in on the 40+ years of TBM manufacturing legacy and for mining and tunneling environments. BROOKVILLE’s difficult situations. For water and gas storage, BabEng is specialized in engineering and manufacturing full portfolio also includes rubber-tired specialty vehicles joins forces with project developers and construction range of tunnel boring machines for both traffic and for mining environments. Propulsion offerings include companies. TPC Tunnelsoft, the software branch, sup- projects around the world, including diesel or battery power systems and equipment can ports the tunneling industry with specialized software EPB, single shield, double shield and dual mode be designed to a wide range of weight and profile for technical data management and visualization on convertible TBMs. By leveraging our modern and high requirements specific to each project’s needs. tunnel projects. Its unique flexibility, combined with capacity factory in China, Lovsuns is fully committed BROOKVILLE is dedicated to collaborating with new powerful automatic reporting and notification tools, and capable of supplying new TBM and legacy LOVAT and longtime clients to develop innovative, custom makes it one of the leading solutions in the market. TBM refurbishment support solutions for our global solutions that are designed to add value through customers. improved efficiency, environment, and safety. Gall Zeidler Consultants McMillen Jacobs Associates AMIX Systems Ltd. Bronze Sponsor Gall Zeidler Consultants is an international engineering Women in Tunneling Reception Bronze Sponsor consultancy specialized in solutions for tunnel and McMillen Jacobs Associates specializes in delivering AMIX Systems Ltd. is a design, engineering and fabri- underground schemes. We provide geotechnical and underground and water resources infrastructure and cation team that solves problems for today’s most chal- tunnel engineering services along with consultancy in providing technical engineering design and construc- lenging grout mixing & backfill projects. We take com- tunnel construction as well as program and construc- tion expertise in the water, wastewater, transporta- plex project needs and build automated, self-cleaning tion management. We use our wide range of expertise tion, transit, and energy/power industries. Offering products and systems that simplify the grout mixing in mining, transportation, infrastructure and water a full range of design, design-build, self-performing process. If you are retrofitting existing plants, we’re conveyance, projects to help our clients overcome construction and construction management services, your solution. Our team has deep expertise in systems difficult ground conditions and to provide a superior we work closely with our clients at every stage of a design and control automation. It’s not about selling product from its first conceptual phases to its turn-key project, assisting them with planning, design exper- systems, we’re on a mission to help companies reduce completion. With decades of international experience tise, project management, construction, start-up, and their overall equipment costs and make significant ad- in all areas of underground construction, we are a dispute resolution. McMillen Jacobs is also committed vances in productivity. We now have rental equipment, global leader in our field and have successfully com- to the principles of sustainability in its design and buyback and OEM valve sales programs available for all pleted over 300 miles of tunnels worldwide. construction practices. Our 21 offices in North America your grouting applications! and Australasia and more than 500 staff, serve clients Gall Zeidler Consultants (Headquarters) locally and worldwide. Contact us for more information 44345 Premier Plaza, Suite 210 Dennis Arbour Ashburn, VA 20147 AMIX Systems, Founding Partner & CTO SAK Construction [email protected] Email: [email protected] UCA of SME Young Members Phone: +1 (703) 726-2700 www.gzconsultants.com Reception SAK Construction, LLC (SAK), a national pipeline AZTEC-TYPSA rehabilitation and tunneling services contractor is a Bronze Sponsor Lane Construction Corporation leading provider of pipeline rehabilitation services. AZTEC is a full-service engineering and environmental Mobile App Ad The company solves the challenge of maintaining and consulting firm and is consistently recognized by Engi- The Lane Construction Corporation is one of America’s restoring aging water and sanitary infrastructure for neering News-Record. AZTEC is a wholly-owned sub- leading construction companies, specializing in large, the municipal, energy and industrial markets. sidiary of the TYPSA Group in the United States. TYPSA complex civil infrastructure. For 130 years, it has con- is global engineering, environmental and architectural tributed to the development of the country’s transpor- Founded in 2006, SAK Construction has built a repu- firm with revenues of more than $250M annually, and tation systems including the Interstate Highway and tation as an industry leader and is recognized as one more than 2,800 staff in 50 offices worldwide. a vast network of roads, bridges, airports, metros and of the nation’s most respected pipeline rehabilitation railways. Lane specializes in mobility, tunneling, and contractors. Led by industry pioneers, Bob Affholder, AZTEC-TYPSA is a leader in the field of underground water resources to address sustainable development Jerry Shaw and Tom Kalishman, SAK has become one and with successfully deliv- and climate change adaptation challenges. It is also of the fastest growing privately owned construction ering these services for projects that involved tunnels a pioneer in project delivery methods and the use of companies in the United States. for metros, railways, roadways and hydraulic systems. design-build and public-private partnerships. Based in On average, the AZTEC-TYPSA geotechnical and tun- Cheshire, Connecticut, it is wholly owned by Webuild, neling group is involved in more than 60 miles of tun- a global infrastructure group. nel-related projects every year.

The Lane Construction Corporation 90 Fieldstone Court Cheshire, CT 06410 (203) 235-3351 [email protected]

8 2021 RETC ShowGuideR SHOWGUIDE exhibitor listings as of May 05, 2021 exhibitors

to a successful project. That’s why our tunnel practice Geological, Geotechnical Services and Equipment ABC Industries, Inc experts are recognized for their work on the world’s For over 90 years, ABC Industries continues to be a landmark tunnels. We bring extensive design and con- Main Office leading supplier of high quality, customized ducting struction management expertise, including experience 1999 Avenue of the Stars, Ste 2600 solutions in mine, tunnel and underground construction with alternative delivery projects. Los Angeles, CA 90067 United States of America operations worldwide. As these operations continue Phone: (843) 743-8355 to evolve, ABC proactively collaborates with industry Products & Services www.aecom.com professionals to engineer unique, premium ventilation Consulting Engineers products. Engineering Design and Services for Tunnels A new innovative addition to ABC’s arsenal, RigiVent™ is a flexible, interlocking ducting solution for positive pressure applications requiring minimal storage and ease of handling. Similar to RigiDuct®, RigiVent™ is constructed from filament wound fiberglass rovings and reinforced with polyester fibers for added strength and resiliency. Visit our website to see more innovative ® solutions. RIGIDUCT Products & Services Filament-Wound Fiberglass Tubing Dust and Fume Control Technology Mining Equipment Tunnel Lining and Support Materials A leader in tunnel ventilation, ABC provides high quality, Ventilation Systems, Materials and Equipment customized solutions such as our RigiDuct® filament-wound Main Office fiberglass tubing. Its excellent strength under high degrees 301 Kings Hwy of negative pressure, high resistance to attack from acid or Winona Lake, IN 46590 United States of America Phone: (574) 267-5166 alkaline conditions, and its UV-stabilized rubberized elastic www.abc-industries.net gaskets resist degrading while remaining pliable in cold weather conditions. Learn about our other tunnel offerings, ABC Ventilation Systems such as MineVent® and TruOval MineVent® layflat blower ABC Ventilation Systems is one of the world’s leading tubing by visiting us at abc-industries.net. companies in underground ventilation. ABC Ventilation Systems provides complete turn-key tunnel ventila- tion design and systems from fan to face. ABC Hard- line Ducting is a highly efficient, low resistance, high pressure, flat shipped hard line ducting for positive and negative pressure applications. Hardline is now approved for use in California. ABC Ventilation Systems high pressure Zipper Coupling has one of the lowest resistance and leakage profiles available.

Products & Services Ventilation Systems, Materials and Equipment

Main Office 1802 Quebec Ave Saskatoon, SK S7K 1W2 Canada Phone: (306) 653-4303 www.abcventilation.com

AECOM With more than 2,000 miles of transit, roadway, wa- ter and energy tunnel projects worldwide, AECOM is at the forefront of the industry. Our 500 tunneling experts and 2,000 geotechnical engineers develop innovative, www.abc-industries.net • (574) 267-5166 • (800) 426-0921 award-winning solutions for our clients’ toughest chal- RigiDuct®, MineVent®, and TruOval MineVent® are registered trademarks of lenges around the world. ABC Industries, Inc. AECOM understands that specialized services are vital

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 9 exhibitors

Aerix Industries Products & Services BarChip Inc Aerix Industries (formerly Cellular Concrete Solutions), Roadheaders Provides synthetic fibers for concrete. manufactures and supplies a dynamic product line Rotary Drum Cutters of integrated engineered foam liquid concentrates, Scaling Products & Services Tunnel Boring Equipment enabling its customers to produce and install high Concrete Reinforcement quality lightweight cellular concretes, ideal for annu- Tunnel Lining and Support Materials Underground Excavation Services and Equipment lar grouting, tunnel arch backfill and flowable fill. The Main Office company’s foams also allow its customers to transport PO Box 471007 Main Office tailings, sand, or other construction materials using Charlotte, NC 28247 United States of America 758 Bowman Ave minimal amounts of water. Aerix Industries dedication Phone: (704) 843-8401 Hagerstown, MD 21740 United States of America to research and technical support has allowed it to pro- www.barchip.com vide advanced engineered foam solutions to the con- Phone: (301) 665-1165 struction and mining industries for more than 70 years. Email:[email protected] www.antraquip.net Products & Services Grouting Services, Equipment and Materials Avanti International Avanti International is a producer of high-quality injec- Main Office tion grouts in the U.S. For decades, Avanti’s injection 5902 McIntyre St grouts have been used in geotechnical applications to Golden, CO 80403 United States of America stabilize soils and control groundwater before, during, Phone: (303) 271-1773 and after construction. Injection grouts can be used: 1) www.aerixindustries.com Before tunnel break-ins/outs to stabilize surrounding soils, control groundwater inflow, and improve project Bauer Foundation Corporation AESTUVER - ECO Tunneling productivity; 2) During tunnel construction to stabilize Bauer Foundation Corp. (BFC), the US subsidiary or weak soils, control groundwater ahead of and behind Bauer Spezialtiefbau of Germany, is a deep foundation TBMs, and create a safer work environment; and 3) Main Office and ground improvement contractor. BFC provides After project completion to create an impermeable wa- ground improvement and support of excavation ser- 704 Baker Ln, Ste 5 ter barrier. For more information on Avanti’s injection vices to the tunneling industry including slurry/dia- Winchester, VA 22603 United States of America grouts, visit our website. phragm walls, secant walls, grouting, drilled shafts and Phone: (855) 794-2636 ground freezing. Email:[email protected] Products & Services www.aestuver.com/en/tunnel Ground Improvement Equipment and Services Products & Services Grouting Services, Equipment and Materials Ground Freezing AGRU America, Inc Pumps and Pumping Equipment Grouting Services, Equipment and Materials AGRU America, Inc. is the world’s leading manufacturer Underground Utility Materials and Operations of flat die extrusion geomembranes, concrete protec- Main Office tive liners and tunnel liners. The company also supplies Main Office 13203 Byrd Legg Dr vertical barrier systems and large diameter piping sys- 822 Bay Star Blvd Odessa, Fl 33556 United States of America tems for the U.S. and international civil/environmental Webster, TX 77598 United States of America Phone: (727) 992-1769 markets. AGRU America is part of the worldwide AGRU Phone: (281) 486-5600 Email:[email protected] Group, an Austrian family-owned business since 1948 Email:[email protected] bauerfoundations.com with production facilities in Austria, the U.S., Germany www.avantigrout.com and China, and distribution in over 80 countries world- wide. Bekaert Ballard Marine Construction Bekaert your global partner for smart reinforcement of Products & Services A leader in tunnel, shaft, caisson and pipeline con- your tunneling and mining project. struction support services for premier tunneling and Precast Concrete Linings We optimize your project by providing innovative, mining contractors, as well as joint ventures. Ballard Tunnel Lining and Support Materials cost-effective and safe solutions. We offer a range of has a reputation for managing highly complex tasks in Water Treatment Plant and Materials high performance Dramix® Steel Fibers directly pro- a cost effective and efficient manner. We have expe- duced in the US to meet the buy America requirements rienced supervisory personnel and a full complement Main Office in rebuilding the infrastructure. of experienced and qualified compressed air workers, Check our website for our impressive reference list. We 500 Garrison Rd dive medical technicians, hyperbaric nurses, hyperbar- have a team of technical experts available, especially Georgetown, SC 29440 United States of America ic physician assistants, and other specialty personnel. dedicated to the underground construction world. #Be- Phone: (843) 546-0600 Ballard owns and maintains related equipment from cause we are tunneling Email:[email protected] shuttles to tunnel specific saturation systems (SAT). www.agruamerica.com Products & Services Products & Services Concrete Reinforcement Antraquip Corp Construction - Contracting Services Engineering Design and Services for Tunnels Antraquip continues to build on its reputation as the Tunnel Boring Equipment Shotcrete Equipment, Supplies, and Services leading supplier of rock and concrete cutting attach- Tunnel Lining and Support Materials ments for excavators which are commonly used for Main Office Underground Excavation Services and Equipment scaling, profiling, mixing/remediation and tunnel en- 727 S 27th St largement projects, as well as roadheaders for tunnel Washougal, WA 98671 United States of America Main Office and mining applications. In the field of tunnel support, Phone: (360) 695-5163 1395 S Marietta Pkwy, Bldg 500, Ste 120 Antraquip offers lattice girders, steel ribs and complete Email:[email protected] Marietta, GA 30067 United States of America casing systems for pipe roofing, anchoring and drain- www.ballardmc.com/projects/tunnel-support/ Phone: +1 (800) 241-4126 age. Other products offered include self drilling rock Email:[email protected] bolts, steel fibers, rock saw attachments and custom www.bekaert.com/underground engineered shaft sinking equipment.

10 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021

exhibitors

focus on the individual needs of our customers by providing a robust stock of the products they need at Colorado School of Mines - all times. Our number one goal is taking care of our Underground Construction and customers and building a strong relationship. Tunnel Engineering Products & Services Brookville Equipment Corp Conveyor Equipment and Systems Degree Brookville is a leading manufacturer of rail-mounted Electrical - Generator-Motor, Wire-Cable diesel and battery-powered tunneling locomotives and Hoists and Headframes Products & Services Educational personnel carriers. Featuring planetary final drive gear Instrumentation Equipment and Services reducers at each wheel end to divide driveline torque, Safety Products shock loading for reduced stress and longer service life, Tunnel Communication Systems and Equipment Main Office and liquid-cooled internal wet disc brakes to extend 1500 Illinois St brake life and provide maximum braking capacity for Main Office Golden, CO 80401 United States of America Phone: (303) 273-3247 long, continuous grades, Brookville units are designed 6822 Barger Pond Way mines.edu for dependability. Optional equipment features include Knoxville, TN 37912 United States of America explosion proofing and patented on-board rerailing Phone: (865) 771-4074 systems to enhance safety in all work environments. Email:[email protected] Crux Subsurface, Inc Brookville also manufactures rubber-tired equipment, www.carrolltechnologiesgroup.com Crux is a leader in geotechnical construction and ex- ideal for steep tunnel grades, inspections, and mainte- ploration. With more than 20 years’ experience in the nance for non-tracked projects. ChemGrout, Inc tunneling industry, the company has provided solutions to some of the most difficult-access and geologically With more than 57 years of experience, ChemGrout Products & Services challenging projects in North America. Crux specializ- continues to manufacture the worlds largest selection Mining Equipment es in long range horizontal coring, surveying, of grouting equipment. ChemGrout’s underground Rail Products optical and acoustical televiewer services, high-quality equipment offers exceptional productivity for contact Underground Locomotives and Rail Haulage Equipment sampling, and instrumentation installation. Pre-ex- grouting, water cut-offs, cable stays and rock bolts. cavation stabilization services include dewatering, Its patented pumps are industry standards offering Main Office permeation and compaction grouting, tube arch can- reliability and durability, along with unique features 175 Evans St opies, and cased horizontal . Crux provides simplifying clean up and maintenance. Offering many Brookville, PA 15825 United States of America design-build services and a fleet of custom designed unique and innovative features, ChemGrout has re- Phone: (814) 849-2000 equipment to ensure unique project needs can be met. www.brookvillecorp.com mained the industry leader in underground grouting since 1963. Products & Services CAB Products & Services Construction - Contracting Services Drilling Services and Equipment For over 45 years CAB has been supplying the tunneling Grouting Services, Equipment and Materials Geological, Geotechnical Services and Equipment and mining industry with high quality hangers and mine Pumps and Pumping Equipment safety products. CAB hangers are widely recognized for Ground Improvement Equipment and Services their high strength, quality and important safety fea- Main Office Grouting Services, Equipment and Materials Instrumentation Equipment and Services tures. They are designed to safely support all types of 805 E 31st St sensor, data, control, communication and electrical ca- LaGrange Park, IL 60526 United States of America bles in above and below ground operations. Phone: (708) 354-7112 Main Office 4308 N Barker Rd With the growing importance of Safety in the Industries, Email:[email protected] Spokane Valley, WA 99027 United States of America CAB has greatly expanded its line of Safety Products in www.chemgrout.com recent years. This includes products such as high-visi- Phone: (509) 892-9409 bility streamers, markers, tubes, bags, and apparel. Email:[email protected] CJGeo www.cruxsub.com Products & Services We’re a cellular grouting contractor based in Virginia, Electrical - Generator-Motor, Wire-Cable and work from Maine to Miami and out to the Missis- Dibit Measuring Technique Mining Equipment sippi. Utilizing high shear mixing, our plants generate Safety Products up to 300CY/hour of cellular grout that breaks 30% USA, Inc Underground Utility Materials and Operations to 50% higher than traditional cellular grout mixes. Dibit Measuring Technique USA, Inc. is a worldwide Ventilation Systems, Materials and Equipment operating engineering office specialized in tunnel sur- Products & Services veying and tunnel scanning. Through decades of ex- Main Office Ground Improvement Equipment and Services perience, hardware and software technologies have 175 Industrial Park Rd Grouting Services, Equipment and Materials evolved steadily, enabling Dibit to provide high-skilled Ebensburg, PA 15931 United States of America surveying services and sophisticated scanning solu- Phone: (814) 472-5077 Main Office tions. Each scanning system and solution is specialized www.cabproducts.com 3402 Acorn St, Ste 200 for different tasks, such as excavation scanning, as- Williamsburg, VA 23188 United States of America built documentation, or inspections. Independently of Phone: (800) 428-5690 the various scanning systems, the result is a high-res- Carroll Technologies Group Email:[email protected] olution, true-color 3D-model. This 3D-model builds the Carroll Technologies Group is a leading provider of www.cjgeo.com basis for any further analysis like volume and thickness Communications, Electronics, and Safety Equipment calculations, or geometry and clearance checks as well for the tunneling and mining sectors. We distribute as mapping geological and geotechnical information. products for over 80 manufacturers, repair/calibrate over 75% of those products, and have a service team Products & Services on hand to help facilitate those needs. Our company Construction - Contracting Services is dedicated to give you a service model 24/7 and we Engineering Design and Services for Tunnels Geological, Geotechnical Services and Equipment

12 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 exhibitors

Booth # 527 Durable. Designed Dependable. to Meet Your Demands.

+1 814.849.2000 • brookvillecorp.com

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 13 exhibitors

Instrumentation Equipment and Services Dräger Products & Services Survey Equipment and Lasers Ground Improvement Equipment and Services Products & Services Grouting Services, Equipment and Materials Main Office Tunnel Lining and Support Materials 8561 154th Ave NE, Ste 100 Mining Equipment Safety Products Redmond, WA 98052 United States of America Main Office Phone: (425) 647-6502 Main Office 1032 E Chestnut St Email:[email protected] Louisville, KY 40204 United States of America 7256 S Sam Houston Pkwy W, Ste 100 www.dibit.at/en Phone: (502) 473-1001 Houston, TX 77085 United States of America www.dsiunderground.com Phone: (800) 437-2437 Dr. Sauer & Partners Corp www.draeger.com Dr. Sauer & Partners has been in practice in the United EC Applications - Tunnel Lining States for over 30 years, and employs tunnel engineers EC Applications supplies and installs protective tunnel at main offices located in Washington D.C., London and liner systems combining the advantages of thermo- Salzburg. The firm provides cost effective and inno- plastics (HDPE and LLDPE) with associated materials vative tunneling solutions using conventional mining (geotextile, waterbar, injectable grout hose and com- approaches to owners and contractors. Dr. Sauer & ponents) required for a turnkey tunnel lining system. Partners is recognized worldwide as one of the leading ECA’s qualified installation technicians, project experi- consultants for design and construction supervision of ence and Los Angeles based fabrication facility provide tunnels and underground structures. The application of DSI Tunneling LLC a cost effective solution for geomembrane tunnel lining innovative design solutions and high quality field su- on any project. pervision has led to the successful completion of nu- DSI has provided ground support products to the un- merous transportation and utility tunnels. derground construction industry for nearly 100 years. With our signature 4flange liner plate and superior Products & Services beam bending capabilities we are the premier supplier Construction - Contracting Services Products & Services Tunnel Lining and Support Materials Consulting Engineers of steel supports to tunnels and mines. We also offer Engineering Design and Services for Tunnels engineering services from design through bidding to stamped submittals. Our range of products inlcude DSI Main Office and Alwag rock bolts and Sequential Excavation Meth- 901 E Orangethorpe Ave Main Office Anaheim, CA 92801 United States of America 560 Herndon Pkwy, Ste 310 od (SEM): pipe umbrellas, lattice girders, forepoling. DSI also has a full line of TBM support products including Phone: (714) 921-9848 Herndon, VA 20170 United States of America www.tunnellining.com Phone: (703) 707-0700 drill consumables, large batch plants for back filling Email:[email protected] segment tunnels, Condat TBM Lubricants, Biomarine www.dr-sauer.com Rescue Equipment and Strata radios. Englo, Inc, DBA Engart, Inc Dust Extraction engineering, Manufacturing and Ser- vice of complete dust removal systems.

Products & Services Dust and Fume Control Technology Underground Excavation Services and Equipment Ventilation Systems, Materials and Equipment INNOVATIVE Main Office PO Box 1124 TUNNEL Beckley, WV 25802 United States of America Phone: (304) 253-0777 ENGINEERING www.engartglobal.com

TUNNEL DESIGN GEOTECHNICAL ENGINEERING CONSTRUCTION MANAGEMENT INSTRUMENTATION & MONITORING WATERPROOFING & WATER CONTROL Epiroc Epiroc is a leading global productivity partner for the TUNNEL REHABILITATION mining and infrastructure industries. With cutting-edge MINING SUPPORT SERVICES technology, Epiroc develops and produces innovative, safe and sustainable drill rigs, rock excavation and con- www.dr-sauer.com struction equipment and tools. The company also pro- vides world-class service and solutions for automation Salzburg | London | Washington | Toronto and interoperability. The company is headquartered in the US near Denver, Colorado. Employing approximately

14 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021

Dr. Sauer Ad 86x114 0119 v1 Hi-Res AW.indd 2 04/02/2019 12:36 exhibitors

450 people, it extends its reach through a nationwide Main Office GeoStructural Engineering Inc network of service centers and drilling distributors. 24 B Celestial Dr Learn more by visiting our website. Narragansett, RI 02882 United States of America Main Office Phone: (401) 782-1045 7172 Regional St, #440 Products & Services www.geo-instruments.com Hydraulic Hammers and Drills Dublin, CA 94568 United States of America Mining Equipment Phone: (707) 322-3507 Rock Drills Geokon, Inc Email:[email protected] Rotary Drum Cutters Geokon, Inc. is a specialist in the supply of instruments www.geostructuralengineering.com Tunnel Boring Equipment for the NATM method of tunnel support. In addition Ventilation Systems, Materials and Equipment to almost all major cities in the USA, the company Gomez International, Inc has instrumented subway systems in Seoul, , Gomez International Incorporated (WBE/WOSB Certi- Guangzou, Istanbul, Hong Kong, Singapore and Lon- Main Office fied). 80 years combined experience, specializing in don. Geokon also has instruments in the Channel Tun- 8001 Arista Pl, Ste 400 underground excavation, operation systems, TBM ap- nel. Call Geokon for a quote or with questions on an Broomfield, CO 80021 United States of America plication, design, procurement, and sales. Licensed application. The company is prompt and courteous in Phone: (844) 437-4762 ENGINEERING/CONSULTING DIVISION provides services its replies. Email:[email protected] from project concept to completion. MANUFACTUR- www.epiroc.us ING/REBUILD DIVISION includes a complete machine Products & Services shop, with certified located in Phoenix, AZ and Geological, Geotechnical Services and Equipment can manufacture/refurbish custom designed equip- FAMA srl Instrumentation Equipment and Services ment. EQUIPMENT SALES DIVISION has a variety of equipment for sale/lease to fit your specific needs. Main Office Main Office OEM Representative for: Sagami Servo Grout/Slurry 48 Spencer St Plants, Peristaltic Pumps; Shin-Tomoe Battery Powered Via Della Fossa 6 Lebanon, NH 03766 United States of America locomotives; Mutsubishi Tunnel Entrance/Exit Seals; Zoppola, Pordenone 33080 Italy Phone: (603) 448-1562 GIW Slurry Pumps; General Cable; TJB Couplers; Toshi- Phone: 0434979792 Email:[email protected] ba Motors; Tsurumi Pumps and Littelfuse Electrical Email:[email protected] www.geokon.com Components www.famaspa.it Products & Services Geocomp Corp/GeoTesting Express, Inc Celebrating more than 35 years of managing risk for CLASSIFIEDS infrastructure. Geocomp designs, installs, and manag- es comprehensive, web-based performance monitoring programs for all types of civil engineering structures. We provide instrumentation and real-time monitoring services on projects from small to large. Geocomp also BUSINESS OFFICE PRESS RELEASES helps identify, assess, and mitigate risks associated SME - 8307 Shaffer Parkway Steve Kral with construction by providing quantitative identifica- Littleton, CO 80127 [email protected] tion of risks and the potential impact to project cost, 800-763-3132 • Advertising: x243 schedule, and quality. Our laboratory division, GeoTest- Direct: 303-948-4243 ADVERTISING AND ing Express, is a fully accredited world-class laboratory Fax: 303-973-3845 www.smenet.org PRODUCTION/ that provides high-quality results with fast turnaround MEDIA MANAGER time for mechanical and physical properties testing on EDITOR Johanna McGinnis soils, rocks, and geosynthetics. Steve Kral [email protected] [email protected] Products & Services Rock Splitting Mortar SENIOR EDITOR PRODUCTION DESIGNER Consulting Engineers D-mite Fractures Rock and Concrete in No Blast Conditions Nate Hurianek Engineering Design and Services for Tunnels Bill Gleason D-mite aids and accelerates mechanical rock excavation [email protected] Geological, Geotechnical Services and Equipment [email protected] Instrumentation Equipment and Services No fly rock, no vibration, no noise, Soil Conditioning Equipment and Materials Applications: Boulders, mass rock, tunneling, concrete removal Main Office DAIGH COMPANY, INC. Tunneling & Underground Construction is supported 125 Nagog Park 2393 Canton Hwy, Ste 400, Cumming, GA 30040 Acton, MA 01720 United States of America Office: 770-886-4711, Fax: 770-887-3783 Phone: (978) 635-0012 by leaders in the underground industry. Please Email:[email protected] www.daighcompany.com [email protected] www.geocomp.com patronize them and mention their ad in T&UC. Geo-Instruments

Products & Services ADVERTISING SALES OFFICES Geological, Geotechnical Services and Equipment Instrumentation Equipment and Services HOOPER JONES CENTRAL, NW U.S. 847-486 -1021 • Cell: 847-903-1853 • Fax: 847-486-1025 [email protected] SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 15 ADVERTISER PAGE NO. MARSHA TABB EAST, SOUTH, WEST U.S. 215-794-3442 • Fax: 215-794-2247 AKKERMAN, INC...... 9 [email protected]

BRIERLEY ASSOCIATES ...... 17 LEWIS BONDER CANADA 514-485-3083 • Fax: 514-487-0553 CELLULAR CONCRETE LLC ...... 15 [email protected] blank doc.indd 1 5/23/07 1:23:40 PM DAVID R. KLUG & ASSOCIATES, INC...... 7 PATRICK CONNOLLY U.K. AND EUROPE GEOKON ...... 6 44 1702-477341 • Fax: 44 1702-477559 [email protected] HC GLOBAL ...... BACK COVER, 12 GUNTER SCHNEIDER SCANDIN. / EUROPE JACOBS ASSOCIATES ...... 17 49 2131-511801 • 49 2131-4038973 [email protected] JENNMAR CORPORATION ...... 14 JOHANNA MCGINNIS MINING EQUIPMENT, LTD ...... 13 ASIA, RUSSIA, UKRAINE, AFRICA, MID. EAST, LATIN AMER., AUSTRALIA 303-948-4243 • Fax: 303-973-3845 STRATA SAFETY PRODUCTS, INC...... 16 [email protected] WWW.TUCMAGAZINE.COM

46 MARCH 2009 T&UC

MIN_TUC_CLASS.indd 46 2/17/09 3:25:59 PM Road, metro, and railway tunnels for efficient traffic PIONEERING network. By the middle of this century, the world´s population is expected to reach nine billion, and two thirds of these people UNDERGROUND CONSTRUCTION UNDERGROUND will live in large conurbations. To keep people and goods on the move, the way ahead for new efficient infrastructures TOGETHER is leading underground. With state­of­the­art technologies, efficient infrastructures are created exactly where they are needed, even in cramped and complex jobsite conditions. NEWSNEWSNEWSNEWSHerrenknecht technology NEWSpushes the boundaries of feasibility With the experience of more than 4,100 projects, Herrenknecht and creates new tunnelling standards worldwide. Herrenknecht is a technology and market leader in the area of mechanized technology extends existing transport networks and creates new tunnelling technology. Herrenknecht is the only company world­ connections in urban and rural areas – under mountains or deep wide toI deliverNDU cuttingSTRY­edge tunnel PROFIL boring machinesE for all beneath water. ground conditions and in all diameters – ranging from 0.10 to 19 meters. The product range includes tailor­made machines for Innovative solutions for underground supply and disposal traffic, supply and disposal tunnels, technologies for pipeline systems. As the world’s population grows the need for installation as well as drilling equipment for vertical and inclined underground supply tunnels is also increasing; in emerging Jacobs Associatesshafts and deep drilling rigs.involved andin developing all countries aspects as well as in modern metropolises. That is why more than 850 Herrenknecht Utility Tunnelling The Herrenknecht Group achieved a total output of 1,208 million Machines are in operation around the world constructing or of undergroundeuros in 2017. The independent family construction­run business employs laying water and wastewater systems, gas and oil pipelines, as over 5,000 people worldwide, including around 180 trainees. well as conduits for electricity and telecommunications. Here, rom a major mass transit proj- Withtunnels, more than respectively. 70 subsidiaries and The associated tunnels companies are trenchlessexcavation tunnelling technology grouting offers a aheadrange of advantages of the ect in San Juan Puerto Rico to working5.7-m in related (19-ft) fields inexcavated Germany and abroad, and Herrenknecht 3.7-m comparedtunnel to conventional face is construction being procedures:conducted transport, to is able to provide a comprehensive range of services close to business and the environment remain mostly undisturbed when quaint wine designs for the(12-ft) project site inside and the diameter.customer, quickly and in a targeted Micromachines,protect HDDthe rigs groundwater or shaft sinking equipment resources are being F ® developers and private owners in way. UnderMaking the umbrella the of the project Herrenknecht challenging Group, a team of used.under Innovations U.S. such Forest as Direct Pipe Service set new standardsland. in the innovative specialists offers integrated tunnelling solutions with semi­trenchless installation. The new technology E­Power Pipe® California and an underground proj- projectwas­specific the equipmentfact that and service the packagestunnels upon request:pass allows the Jacobssecure and Associates quick installation providesof underground wine cable ect that will add millions of gallons of separationthrough plants, granite, belt conveyor gneiss systems, navigationand marble systems, protectioncave pipesdesign with smallerservices diameters for and developers, long advance rolling stock systems as well as segment moulds and even lengths. Innovative HDD tools simplify pipeline construction want to Southern California’s water turnkeyrock segment formations. production plants. operationsprivate at key sections.owners The Herrenknechtand wine product cave portfolio con is - supply, Jacobs Associates is involved Ground conditions in the tunnels completedtractors. by a broad With range ofmore equipment than for the 20 areas years of mining of As a reliable project partner, Herrenknecht supports its customers (construction of underground infrastructures around raw material in almost all levels of underground withrange an extensive from range massive, of services hard,from the strongbeginning ofand the deposits)wine and cave exploration design (oil, gas andexperience geothermal energy). and 50 construction and tunneling. projectabrasive to breakthrough. rock From to the very initial projectblocky idea throughand years of tunneling experience, the manufacturing, transport, assembly, tunnelling support and In 1954 Donavan Jacobs estab- spareseamy parts service rock to anddisassembly, crushed Herrenknecht ground. accompanies Ad- company is able to provide creative, lished the business as a one-person theditionally, process at the thecustomer‘s tunnel side. alignments Even personnel solutions cross functional designs that meet the for the temporary supplementing of jobsite crews are provided consulting firm. He took his first if required.active With splays competent of the service San specialists Andreas and 40 Fault years varying code standards throughout assignment in this role as project of inexperience three in locations.the tunnelling industry, the company regularly California’s counties. engineer for a consortium of Kaiser- supportsControl around 300 jobsites ofexhibitors ground worldwide waterand offers inflowscustomized While much of the work Jacobs service packages tailored to individual project requirements. DERRICK SLURRY SEPARATION TECHNOLOGY Walsh-Perini-Raymond on a suc- is critical in order to avoid impacts to Associates does is in California, the Consulting Engineers PATENTED SCREEN SURFACES I COMPLETE SYSTEMS I SOLIDS REMOVAL EQUIPMENT cessful contract bid for the Snowy the San BernardinoElectrical - Generator-Motor, National Wire-Cable Forest firmHERRENKNECHT is not limited. AG One of it biggest Engineering Design and Services for Tunnels 77963 Schwanau Fabrication Materials Germany Mountain hydro electric tunnel proj- and San ManwelPumps and Pumping Indian Equipment Reserva- current projects is the Rio Piedra Civil Construction Applications: Tunnel Boring Equipment Phone +49 7824 302-0 ect in New South Wales, Australia. tion. ContractFax +49 7824 in 3403 San Juan Puerto Rico. n Microtunneling n Slurry Wall/Foundation Drilling Main Office [email protected] More than 50 years later, Jacobs The tunnel lining for the Arrow- This job consists of a 1,500-m n Large Diameter Tunneling n Water Well Drilling 1415 E Elwood St Hager-Richterwww.herrenknecht.com Geoscience, Inc Phoenix, AZ 85040 United States of America n n Associates is one of the most suc- head Tunnels isPhone: designed (520) 836-7869 to withstandHager-Richter (4,921-ft) Geoscience, Inc. is a well-establishedlong underground rapid Hydrovac Mud Processing Horizontal Directional Drilling Email:[email protected] small business that specializes in Surface and Bore- Herrenknecht Tunnelling cessful contractors in America. The an earthquakewww.gomezinternational.com of magnitude 8.0. Inhole Geophysicstransit for Engineering guideway applications (NAICS with two under- 541360). The firm has been in business since 1984, Systems USA, Inc company was ranked ninth among addition, one portion of the align-has earnedground an excellent national subway reputation, and has astations. Herrenknecht is a technology and market leader in Grydale USA nationwide practice. Hager-Richter is headquartered in the area of mechanized tunnelling systems. As the all contractors by Engineering News- ment crosses Grydalean is activea pioneer in developing splay mobile dustof collec the- Salem, New HampshireMost and has had aof fully staffedthe and projectonly company worldwide, structures Herrenknecht delivers cut- tion and ventilation units for the tunneling industry. Let equipped New York/New Jersey Regional Office in New ting-edge tunnel boring machines for all ground con- Record in 2006. San Andreas usFault, partner with youwhere to meet worker asafety special standards, Jersey sinceare 2001. Hager-Richterlocated has extensive below expe- ditions the and groundwaterin all diameters – ranging from 0.10 to decrease machine downtime, and increase excavation rience in providing high resolution geophysical services 19 meters. The Herrenknecht product range includes Jacobs Associates currently has lining sectionrates. was used to accom-to support largetable and small tunnelingand infrastructure many proj - oftailor-made the machinestunnels for transport pass tunnels (Traffic ects across the country. Tunnelling) and supply and disposal tunnels (Utility Tun- Products & Services beneath occupiednelling). historical Furthermore, Herrenknecht build supplies -an entire seven offices and numerous projects modate faultDust rupture.and Fume Control Technology A primaryProducts & Services range of innovative machines for the mechanized con- Ventilation Systems, Materials and Equipment Consulting Engineers struction of underground mining infrastructures. The in the works. lining of bolted and gasketed precastConsulting ingsEnvironmental with less thancompany 5 also m produces (16 state-of-the-art ft) ofdeep drilling Main Office Geological, Geotechnical Services and Equipment rigs that drill down to depths of 8,000m and plants for One of the largest current projects concrete segments14900 Interurban was Ave S, Ste 271,designed PMB #88 to cover. the exploration of shallow geothermal energy. Seattle, WA 98168 United States of America Main Office for Jacobs Associates is in San Ber- withstand a pressurePhone: +1 (888) 479-3253 of 274 m (9008 Industrial Way D10A unique aspectProducts of & thisServices project Email:[email protected] Salem, NH 03079 United States of America Earth Pressure Balance Machines nardino and Riverside counties, CA. ft) of hydrostaticwww.grydaleusa.com head — the highestPhone: (603)is 370-7518 that different tunnelingMicrotunneling Equipment, methods Tools, and Supplies Email:[email protected] Rock TBM’s That is where Jacobs is working on pressure ever considered in designhager-richter.net/ were used alongShaft the Drilling and alignment, Raiseboring Equipment H + E Logistik GmbH Soft Ground Shields which yielded manyTunnel Boringlessons Equipment on the the Inland Feeder’s 72-km (45-mile) of a segmentalMain Officetunnel lining. Two alignment of large-diameter tunnels closed-face tunnelJosef-Baumann boringStr. 18 machines impact of these Mainmethods Office on the Bochum 44805 Germany 1613 132nd Ave E, Ste 200 and pipelines that will extend from designed to withstandPhone: +49 (234) 950 a 23 pressure 60 of 91 structures above. ■Sumner, WA 98390 United States of America Email:[email protected] Phone: (253) 447-2300 the foothills of the San Bernardino m (300 ft) of www.helogistik.de www.herrenknecht.com Mountains to the Colorado River hydrostatic Aqueduct in Riverside County, CA. load were The project will nearly double used to ex- DAVIDDAVID R.R. KLUGKLUG && ASSOCIATES,ASSOCIATES, INC.INC. the delivery capability of the Metro- cavate the Leading-Edge Slurry Separation Solutions politan Water District of Southern Arrowhead Backed by nearly 70 years of cost-effective solutions, Derrick has California’s (MWD) from the east Tunnels. In SpecialtySpecialty Products Marketing and Services Services to for the the manufactured innovative technologies for numerous civil construction North American Tunneling Industry applications for over three decades. Derrick’s separation technology branch of the State Water Project. combina- North American Tunneling and Mining Industries offers unmatched solids removal performance. Our civil construction solutions are currently used worldwide by companies that require high- Site Video It is expected to be able to provide tion with the In camera mode, hover phone over David R. Klug - President efficiency separation and slurry dewatering in environmentally sensitive QR code to watch full video. southern Californians with as much watertight and urban environments. (No app required) as 2.46 GL/d (650 million gal/d) of primary and www.drklug.com Two Penn Center West, Suite 122 Tel (412) 787-2255 additional water. final linings, 6000 Waterdam Plaza Dr., Ste. 120 Tel (724) 942-4670 Derrick Equipment Company Exclusive Distributor Pittsburgh, Pennsylvania 15276-0102 Fax (412) 787-5267 15630 Export Plaza Drive Clean Slurry Technology, Inc. The project is comprised of the extensive McMurray, Pennsylvania 15317 Fax (724) 942-4671 Houston, Texas 77032 4101 Union Ave East and West contracts that are probe-drill- Email: [email protected] Cell (412) 670-0263 Toll Free: (866) DERRICK Bakersfield, California 93305 Email: [email protected] Cell (412) 670-0263 www.Derrick.com Toll Free: (877) 365-8396 9.6 km (6 miles) and 8 km (5 miles) ing and pre- www.CleanSlurry.com 16 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021

T&UC MARCH 2007 11

MIN_088_091.indd 4 2/27/07 3:36:05 PM DERRICK SLURRY SEPARATION TECHNOLOGY PATENTED SCREEN SURFACES I COMPLETE SYSTEMS I SOLIDS REMOVAL EQUIPMENT

Civil Construction Applications: n Microtunneling n Slurry Wall/Foundation Drilling n Large Diameter Tunneling n Water Well Drilling n Hydrovac Mud Processing n Horizontal Directional Drilling

Leading-Edge Slurry Separation Solutions Backed by nearly 70 years of cost-effective solutions, Derrick has manufactured innovative technologies for numerous civil construction applications for over three decades. Derrick’s separation technology offers unmatched solids removal performance. Our civil construction solutions are currently used worldwide by companies that require high- Site Video In camera mode, hover phone over efficiency separation and slurry dewatering in environmentally sensitive QR code to watch full video. and urban environments. (No app required)

Derrick Equipment Company Exclusive Distributor 15630 Export Plaza Drive Clean Slurry Technology, Inc. Houston, Texas 77032 4101 Union Ave Toll Free: (866) DERRICK Bakersfield, California 93305 www.Derrick.com Toll Free: (877) 365-8396 www.CleanSlurry.com exhibitors

Main Office Houston, TX 77073 United States of America 350th 5th Ave, 57th Flr Phone: (281) 821-2200 Empire State Building Email:[email protected] New York, NY 10118 United States of America www.hobaspipe.com Phone: (212) 294-7567 Email:[email protected] www.hntb.com HyperSciences, Inc HNTB Corp HyperSciences’ tunneling solution improves perfor- With 3800 professionals, HNTB is a leader in providing mance, eliminates dangerous explosives, and can even solutions to infrastructure problems nationwide. The HOBAS Pipe USA reduce high capital and operating costs. Our hyperson- firm has a long history in design and engineering ser- Hobas pipes are centrifugally cast, fiberglass-rein- ic tech is engineered to be five-to-ten times faster than vices for tunnels and underground construction. HNTB forced, polymer mortar (CCFRPM) pipe, they are inher- traditional rotary tunnel boring machines (TBMs) or drill has completed award-winning projects on some of the ently corrosion resistant and last 100 years or more. and blast methods, and is modular and small enough to countrys most complex projects, including highway, Engineers and contractors regularly select Hobas pipe be removed and reused (unlike some large TBM sys- transit, rail, aviation and water resources. HNTB’s ex- for all its performance features: light weight, high tems that are left in place). To optimize efficiency, we perts have the insight and knowledge to provide state strength, ease of installation, leak-free push together even can offer remote, AI-enabled robotic operations. of the art innovative solutions to tunneling challenges, joints and adaptability to most installation methods from small diameter excavations to designing the larg- including open cut, sliplining, jacking, microtunneling, Products & Services est bored tunnel in the world (Alaskan Way Tunnel)-- two-pass tunnel, casing carrier and above ground. Drilling Services and Equipment utilizing both conventional tunneling methods (sequen- Non-pressure and pressure classes are manufactured Microtunneling Equipment, Tools, and Supplies tial excavation) or mechanized tunneling for variety of in diameters from 18 to 126 inches. Tunnel Boring Equipment ground conditions. Products & Services Main Office Products & Services Underground Utility Materials and Operations 2311 E Main Ave, Ste 200 Engineering Design and Services for Tunnels Wastewater Management Products Spokane, WA 99202 United States of America Tunnel Boring Equipment Water Treatment Plant and Materials Phone: (509) 443-5746 Tunnel Communication Systems and Equipment Email:[email protected] Tunnel Haulage Systems Main Office www.hypersciences.com Tunnel Lining and Support Materials 1413 E Richey Rd Ventilation Systems, Materials and Equipment HYTORC, Division of Unex Corp HYTORC makes the world’s most trusted industrial bolting systems. With over 50 years of experience,

SHAFTS

TUNNELING

EARTH RETENTION TUNNEL REHABILITATION

DEEP FOUNDATIONS MINE DEVELOPMENT

ARCHITECTURAL SHOTCRETE CONTRACT MINING

GROUND TREATMENT

DEWATERING

D R II L L T E C H D R II L L II N G .. C O M Caliiforniia - Texas - Colorado - Kansas - Maryland

18 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 UNDERGROUND UPLIFTED

Leader In the Design, Development, and Full Service: Engineering Estimates Production of Design Collaboration Contractor Shop Drawings Underground Steel Construction Support Supports in North America.

www.dsiunderground.com DSI Tunneling LLC 502-473-1010 exhibitors our team specializes in providing the most efficient working infrastructure for long term construction proj- solutions for your toughest bolting jobs. For custom ects, or battery-powered infrastructure for shorter term projects, our highly-experienced engineering team will inspections. In either case, IWT equipment is 100% re- design a solution tailored to your needs with guaran- coverable and reusable once the project is completed. teed improvements in safety, speed and accuracy. On-site service and preventative maintenance ensures Products & Services your equipment is always ready when you need it. Visit Environmental Control Equipment and Supplies hytorc.com/world for your nearest HYTORC bolting spe- Safety Products cialist. Tunnel Communication Systems and Equipment

Products & Services Main Office Safety Products 1100 Main St IoT Automation Lynchburg, VA 24504 United States of America IoT Automation proudly owns the FireFly Smart Lighting Main Office Phone: (434) 316-5230 System. FireFly enables Real Time Situational Aware- 333 Route 17 N www.iwtwireless.com ness in underground mines and tunnels through con- Mahwah, NJ 07430 United States of America necting current safety and productivity solutions to the Phone: (201) 512-9500 Smart Lighting network. Email:[email protected] The FireFly System reinforces safety procedures in www.hytorc.com the event of emergencies such as seismic events, gas leaks, fires, ground movement, and other mine/ tunnel-wide emergencies. FireFly is purposely built for Innovative Wireless underground mining and tunneling—utilising indus- Technologies try-standard cabling and connectors and IP66 rated Innovative Wireless Technologies, Inc. (IWT) is the lead- modules, the FireFly System is IoT-enhanced through ing supplier of wireless communication and tracking onboard Wi-Fi and Bluetooth radios for wireless device systems for underground applications. IWT’s SENTI- integration such as asset tracking and proximity alerts. NEL™ system is easy to install and maintain and pro- vides crystal clear voice communications for maximum Products & Services productivity and low cost of ownership. Continuous Control Systems tracking is also supported – all in one system. Environmental Control Equipment and Supplies IWT offers line-powered, battery backed-up, mesh net- Geological, Geotechnical Services and Equipment Lighting Systems

ELEVATED THINKING, UNDERGROUND.

Gall Zeidler Consultants is a worldwide leader in geotechnics, tunnel design, tunnel engineering as well as tunnel construction and program management. From the drawing board through turn-key completion - we provide the expert services to see projects through to their use at the highest quality.

Washington DC . London . New York . San Francisco Salzburg . Santiago de Chile . New Delhi . Singapore www.gzconsultants.com

20 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 High performance tunneling

United. Inspired.

Stepping it up underground Epiroc has your range of tunneling needs covered with face drills, bolters, haulers and related tooling. Let’s talk! Stop by our RETC Booth. June 13–16, 2021 | Las Vegas, NV

844-437-4762 [email protected] epiroc.us exhibitors

Safety Products Main Office Tunnel Communication Systems and Equipment 258 Kappa Dr Pittsburgh, PA 15238 United States of America Main Office Phone: (412) 963-9071 1624 Market St, Ste 202 www.jennmar.com Denver, CO 80202 United States of America Phone: +1 (720) 446-6603 Email:[email protected] www.iotautomation.com.au

J.H. Fletcher & Co JENNMAR Civil JENNMAR has been an innovative leader in ground con- Products & Services trol for the mining industry for more than forty years. Mining Equipment Over the past decade, the success of our products and Keller Rock Drills Keller Companies: Bencor, Case Foundation, Geo-In- engineering solutions has led us, quite naturally, into Scaling struments, Hayward Baker, Moretrench. tunneling applications as well. The Keller companies provide a full range of subsurface We’ve made key acquisitions of people and equipment solutions for the tunneling industry. Our combined ser- Main Office to further enhance our deep commitment to serve the vices include slurry walls, secant piles, drilled piles, de- 402 High St tunneling industry. watering, all methods of earth retention, ground freez- Huntington, WV 25705 United States of America Our primary product roster includes M3® expandable ing, instrumentation & monitoring, grouting for ground Phone: (304) 525-7811 rock bolts, FRICTION-LOK® stabilizer systems, Fast support and settlement mitigation and more. We solve Email:[email protected] Anchors™ DCP Bolts, steel sets, steel tunnel ribs & complex below ground challenges and reduce risk by www.jhfletcher.com shaft rings, lattice girders, rail ties, resins and with our drawing on a connected Keller network of geotechnical alliance partners, Contech, we also provide 2-flange experts. liner plate. Products & Services Products & Services Ground Freezing Geological, Geotechnical Services and Equipment Ground Improvement Equipment and Services Rail Products Grouting Services, Equipment and Materials Shaft Drilling and Raiseboring Equipment Jet Grouting Equipment and Services Steel Pipe Shaft Drilling and Raiseboring Equipment Tunnel Lining and Support Materials Slurry Services and Machines Ventilation Systems, Materials and Equipment Main Office 7550 Teague Rd, Ste #300 Hanover, MD 21076 United States of America Phone: (410) 551-8200 www.keller-na.com Line Power Custom electrical power distribution and control prod- ucts including portable substations, power centers, vacuum circuit breaker switch houses, longwall con- trols, belt and pump starters, transformers. Custom electrical controls for TBMs.

Products & Services Electrical - Generator-Motor, Wire-Cable Mining Equipment

Main Office Ventilation solutions 329 Williams St Bristol, VA 24201 United States of America tailored to your environment Phone: (276) 466-8200 Auxiliary Fans | Jet Fans | Ventsim™ DESIGN Email:[email protected]

Learn more about our mining and transit tunnel ventilation solutions at: www.howden.com

© Howden Group Ltd. All rights reserved. 2021

22 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 Tunnel & Mining Advert_v4.indd 1 08/02/2021 16:50 DEEP THINKING Underground Solutions

HNTB has set the standard in state-of-the-art tunnel design. A standard based upon solutions that work. A standard that prioritizes safety and efficiency. A standard that reflects the technical excellence that HNTB continues to set the standard for the most complex tunnels and underground projects in the nation.

Sanja Zlatanic Chair, National Tunnel Practice [email protected] 646.652.9440

The HNTB Companies Infrastructure Solutions hntb.com

Alaskan Way Viaduct Replacement Program exhibitors

Main Office Main Office 1144 E Newport Center Dr 23700 Chagrin Blvd Deerfield Beach, FL 33442 United States of America Beachwood, OH 44122 United States of America Phone: (954) 246-8888 Phone: (216) 839-7500 Email:[email protected] Email:[email protected] www.utt.mapei.com/ www.master-builders-solutions.com/EN-US Master Builders Solutions Matrix Design Group Through its Master Builders Solutions brand, BASF is a leading supplier of underground construction solutions Products & Services Dust and Fume Control Technology www.linepower.com that help tunneling customers to become more suc- cessful, even in highly challenging ground conditions. Environmental Control Equipment and Supplies BASF has the largest range of products and services MAPEI Corp available to meet needs and solve problems in TBM and Main Office MAPEIs Underground Tunneling Technology (UTT) cate- conventional tunneling, whether in soft ground or hard 3299 Tower Dr gory offers a complete line of products and associated rock conditions. We offer a full range of MasterRoc® Newburgh, IN 47630 United States of America technologies for use in and on underground construc- tunneling products such as soil conditioning foams and Phone: (812) 490-1525 tion projects, including shotcrete accelerators and ad- polymers, anti-clay agents, tail sealants, anti-abrasion www.matrixteam.com mixtures for concrete, as well as products for injection agents, dust suppressants, bearing seal greases, EP2 and consolidation, mechanized tunneling (TBM), engi- greases and annulus grouts, plus product for sprayed Measurand Inc neering and soil stabilization, coating and protection, concrete and injection for ground consolidation. Measurand designs and manufactures ShapeArrayTM, maintenance, repair and waterproofing. which is used to monitor deformation of soil and struc- Products & Services tures like dams, tunnels, walls, and buildings. Shape- Products & Services Earth Pressure Balance Machines Array is an automated shape-measuring, inclinom- Concrete Reinforcement Ground Improvement Equipment and Services eter-style instrument on a reel, which has set a new Grouting Services, Equipment and Materials Grouting Services, Equipment and Materials standard for ease of installation. ShapeArray data are Lubricants for TBM Lubricants for TBM available in real-time, enabling engineers and design- Shotcrete Equipment, Supplies, and Services Precast Concrete Linings ers to reduce risk and save money by making smarter, Slurry Services and Machines Shotcrete Equipment, Supplies, and Services faster decisions. Soil Conditioning Equipment and Materials

INNOVATION Starts with IWT Innovative is not just in our name. Our engineers thrive on solving issues, specializing in:

• Reliable Voice & Data Communications • Real-time Personnel & Asset Tracking • Wireless Gas Monitoring • Production & Environmental Sensor Data • Equipment State-of-Health Data • Production & Maintenance Analytics Ask about our Rental Program

Start the conversation today at iwttunneling.com

24 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 ANSWERING MINING’S TOUGHEST QUESTIONS

Fletcher values what their customers say. Since 1937, Fletcher has been answering some of underground mining’s toughest questions. At Fletcher we provide an atmosphere for an open dialogue with customers to ensure their operations are reaching maximum efficiency. Is your operation facing obstacles that ® mass produced equipment isn’t addressing?

Contact Fletcher. Ask Questions. We’ll have Answers.

402 HIGH STREET 800.543.5431 HUNTINGTON, WV WWW.JHFLETCHER.COM

J.H. Fletcher & Co. cannot anticipate every mine hazard that may develop during use of these products. Follow your mine plan and/or roof control plan prior to use of the product. Proper use, maintenance and continued use of (OEM) original equipment parts will be essential for maximum operating results. 2020 J.H. Fletcher & Co. All Rights reserved.

2020 ME & TUC.indd 1 4/7/2021 1:33:53 PM Kelley exhibitors Products & Services Email:[email protected] Engineering Design and Services for Tunnels www.miningequipmentltd.com Geological, Geotechnical Services and Equipment EQUIPMENT Instrumentation Equipment and Services Mining Equipment Minova SOLUTIONS Tunnel Communication Systems and Equipment Main Office Main Office 150 Summer Crt 2111 Hanwell Rd Georgetown, KY 40324 United States of America Fredericton, NB E3C 1M7 Canada Phone: (502) 868-6251 Phone: (506) 462-9119 Email:[email protected] Email:[email protected] www.minovaglobal.com www.measurand.com Mobile Air Messinger Bearings Mobile Air & Power Rentals provides a range of tem- Surpassing 100 years, Messinger Bearings is one of an porary equipment such as air conditioners, chillers, elite few companies in the world capable of produc- heaters, dehumidifiers, and HEPA filtration equipment. ing large (up to 25 feet in diameter), custom-designed Our units are available on a temporary, rental basis, or bearings in limited quantities for tunnel boring ma- for long-term needs. chines (TBMs). In fact, Messinger focuses on manufac- MAPR is also proud to provide nationwide disaster turing new and expert repairing of large custom bear- response through its specialty division: Mobile DRi. ings in low volumes for special applications. Messinger Whenever disasters such as hurricanes leave destruc- goes above and beyond supplying just the bearing, tion in their wake, restoration efforts are critical for get- offering complete solutions (field inspection, bearing ting business and other aspects of life back on track. storage tanks, etc.). With Messingers expanding core With a wide selection of dehumidifiers, air movers, of expertise and experience, its customers can expect generators, and more, Mobile DRi is your best option a quick response, unparalleled application support and for disaster relief solutions. timely delivery to better support the tunnel market. Products & Services Products & Services Ventilation Systems, Materials and Equipment Tunnel Boring Equipment Main Office Main Office 1000 Valley Belt Road 10385 Drummond Rd Brooklyn Heights, OH 44131 United States of America Philadelphia, PA 19154 United States of America Phone: (888) 305-3038 Phone: (215) 824-4987 www.mobileair.com/ Kelley Engineered www.messingerbearings.com Equipment LLC Mott MacDonald MILLER Mott MacDonald provides tunnel design and engi- provides engineering neering solutions for rail and transit, road, water/ support and custom Main Office wastewater conveyance, CSO storage, and cable and 5905 Walnut Grove Rd communications. With a reputation for technical excel- equipment design for Carrier Mills, IL 62917 United States of America lence, Mott MacDonald identifies practical approaches your most challenging Phone: (618) 994-4616 to tunneling, equipment selection and contracting ap- Email:[email protected] proaches. Expertise includes soft ground and rock tun- underground projects. [email protected] neling, cut and cover, underground caverns, tunnels, jacked tunnels, and microtunneling. Com- plementary skills in technical areas include tunnel re- PROFESSIONAL habilitation, ground stabilization and treatment, tunnel ENGINEERING SERVICES systems, ventilation, and life safety and security. With CONCEPTUAL DESIGN TO 16,000 employees worldwide, Mott MacDonald is one of the world’s largest employee-owned companies. FIELD SERVICE SPECIALIZED FABRICATION, Mining Equipment Ltd Main Office ASSEMBLY & SHOP TESTING Mining Equipment has been supplying the mining and 111 Wood Ave S tunneling industries with quality rebuilt underground Iselin, NJ 08830 United States of America SITE SPECIFIC ENGINEERING equipment for more than 30 years. The business has Phone: (800) 832-3272 SUPPORT grown to encompass new ventilation equipment, Je- Email:[email protected] tair fans, and new rolling stock, C.S. Card and Moran www.mottmac.com www.keellc.com Engineering. Mining Equipment, Jetair and Mine Hoists International are currently doing business in North and [email protected] South America, Australia, Asia, Africa and Europe. MSP Structures Inc +1 206 412 4234 Our mission is to offer innovative solutions for con- Products & Services struction projects that require custom formwork, struc- Ventilation Systems, Materials and Equipment tures and products. PROUD PARTNERS OF We have established a solid reputation as a partner Main Office who listens and adapts the solutions to our client’s spe- cific needs. We stand out with our engineering exper- 484 Turner Dr, Ste 201C tise, responsiveness, quality of design and fabrication. Durango, CO 81303 United States of America We also specialize in multiple areas in the precast Phone: (970) 259-0412 world:

26 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 For more information on our portfolio of diverse and complementary brands visit us at WWW.JENNMAR.COM.

SAFETY,SAFETY, SERVICE, SERVICE, AND INNOVATION INNOVATION

JENNMARJENNMAR offers a offers wide rangea wide of range products of products used in used supporting, in supporting, building building and rebuilding and rebuilding our infrastructure our infrastructure from above and belowfrom ground. above andOur belowstrength ground. lies in Our our strengthability to liesoffer in ourour customersability to offer solutions our customers in every phase solutions of their in every projects. In additionphase to ofmore their than projects. 20 strategically In addition located to more manufacturing than 20 strategically facilities, located our affiliated manufacturing brands facilities,of companies our include engineeringaffiliated services, brands resin of manufacturing,companies include rolled-steel engineering and drill-steelservices, resin manufacturing, manufacturing, custom rolled-steel steel fabrication, and drill- precision wear parts,steel tools manufacturing, and bits made custom from steel tungsten fabrication, carbide precision and steels, wear chemical parts, tools roof supportand bits andmade sealing from tungstenproducts, and even includescarbide staffing and steels, solutions chemical and roof our supportown trucking and sealing company. products, JENNMAR and iseven backed includes by experienced staffing solutions engineers and techniciansand ourwho own are truckingwith you company.every step JENNMAR of the way, is from backed initial by consultationexperienced to engineers qualified and instruction technicians and who on-going are technicalwith support you every to make step your of the project way, from a success! initial consultation to qualified instruction and on-going technical support to make your project a success!

GLOBAL HEADQUARTERS • (412)-963-9071 • PITTSBURGH, PA USA • WWW.JENNMAR.COM exhibitors

Pre-stressed Bridge Girders, Precast Tunnel Segments, with real-world applications in mind. With an unwav- Storm Water Management Systems, Parking Drainage ering commitment to product quality and exceptional Parsons Systems, Box Culverts, Retention Walls, Catch Bassin customer service, Nightstick – Life Depends on Light™. Parsons (NYSE: PSN) is a leading technology firm driv- Tops. Explosive Environments; Industrial Plants; Automotive ing the future of critical infrastructure, defense, and Shops; intelligence. Our expertise in engineering, construction, Products & Services EMS; Rescue Teams; Law Enforcement; Fire Fighting, technical, and management services allows us to pro- Consulting Engineers Protection and Inspection; Security; Military Operations. vide innovative, alternative delivery methods to cus- Engineering Design and Services for Tunnels tomers worldwide. We provide groundbreaking solu- Precast Concrete Linings Products & Services tions to some of the largest, most complex tunnel and Segment Accessories Lighting Systems underground construction projects in the world. From Tunnel Lining and Support Materials Safety Products planning and design through construction management and operations, Parsons provides a complete range of Main Office Main Office services for underground utilities, water, wastewater, and transportation tunnels. Our experts are dedicated 162 Cowie St, Ste 100 640 S Sanden Blvd to overcoming the toughest challenges to help our cus- Granby, QC J2G 3V3 Canada Wylie, TX 75098 United States of America tomers move safely under or through any obstacle. Phone: (450) 558-7141 Phone: (800) 233-2155 Email:[email protected] Email:[email protected] www.mspstructures.com www.nightstick.com Products & Services Consulting Engineers Engineering Design and Services for Tunnels Naylor Pipe Co Normet Americas, Inc Geological, Geotechnical Services and Equipment Naylor Pipe is manufactured in accordance with ASTM Normet provides solutions for selected, demanding A-139 and ASTM A-211 specifications. Diameters from customer processes in underground mining and tunnel- Main Office 4” to 96”, and thicknesses from 1/16” to 1/2”. Also ing. For 50 years Normet has developed, manufactured 5875 Trinity Pkwy, Ste 300 available are the necessary fittings and connections and marketed equipment and vehicles for underground Centreville, VA 20120 United States of America including the exclusive Naylor Heavy Duty Wedgelock applications. In addition, it provides a comprehensive Phone: (248) 513-2391 Couplings to complete your pipe system. range of life time care services e.g. maintenance, ser- Email:[email protected] vice programs and spare parts. Normet offers solutions www.parsons.com/tunnel/ Products & Services for the following underground customer processes: Steel Pipe concrete spraying and transport, explosive charging, lifting and installation, underground logistics and scal- Pipe Me In Main Office ing. For concrete spraying and transport, Normet pro- 1230 E 92nd St vides equipment, comprehensive range of construction Products & Services Chicago, IL 60619 United States of America chemicals and support for the whole application. Consulting Engineers Phone: (773) 721-9400 Electrical - Generator-Motor, Wire-Cable Email:[email protected] Products & Services Microtunneling Equipment, Tools, and Supplies www.naylorpipe.com Grouting Services, Equipment and Materials Tunnel Lining and Support Materials Tunnel Lining and Support Materials Underground Utility Materials and Operations

Nicholson Construction Co Main Office Main Office Founded in 1955, Nicholson is a leader in geotechnical 1414 Gladiola St, Ste 100 2508 Cedar Creek Rd construction, providing a wide range of deep founda- Salt Lake City, UT 84104 United States of America North Little Rock, AR 72116 United States of America tion, earth retention and ground treatmentservices Phone: (801) 596-4700 Phone: (501) 944-7473 on projects throughout the United States. For tunnels, www.normet.com Email:[email protected] Nicholson constructs access shafts with diaphragm www.pipemein.com walls and jet grout columns and the company supports operations with a wide variety of grouting and earth Northwest Laborers-Employers retention techniques. Nicholson has offices around the Renesco Inc country to address each region’s unique geotechnical Training Trust Established in 1965, Renesco has developed from a lo- construction needs. The Safety and Hazard Awareness for Tunnels (SHAFT) cal Swiss tunnel sealing company to an internationally courses are designed to teach skills for working safely recognized specialist for the execution of waterproofing Products & Services in tunnels constructed using a tunnel boring machine and grouting solutions for all kinds of underground, hy- (TBM). Grouting Services, Equipment and Materials draulic, civil and environment structures. #Specialized The program was developed by the Northwest Labor- Geomembrane installer #Sheet Waterproofing PVC-P, ers-Employers Training Trust with input and consulta- Main Office TPO/FPO, HDPE, Water and Frost Protection #Spray ap- tion from several organizations. plied/ Liquide applied Waterproofing #Compensation, 2400 Ansys Dr, Ste 303 In addition to classroom lecture and discussion, partic- Permeation and Contact Grouting, Ground Stabilization Canonsburg, PA 15317 United States of America ipants have the experience of training in a simulated, #Curtain injection, injections into hard and unconsoli- Phone: (412) 221-4500 lifelike tunneling environment. dated rock #Specialized Drilling Services #Controlling, www.nicholsonconstruction.com Monitoring and Data Management. Products & Services Nightstick Educational Products & Services Designed and manufactured by Bayco Products, Inc., Grouting Services, Equipment and Materials Nightstick is a global brand of professional lighting Main Office Tunnel Lining and Support Materials products, including flashlights, floodlights, headlamps 27055 Ohio Ave NE and numerous Intrinsically Safe lighting solutions that Kingston, WA 98346 United States of America Main Office continue to exceed industry standards in performance, Phone: (360) 297-3035 3935 Avion Park Ct, Ste A106 quality, user-safety, and value. Nightstick’s vast line-up www.nwlett.org Chantilly, VA 20151 United States of America of LED lighting products delivers optimal performance Phone: (703) 657-2800 www.renesco.com

28 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 Proven Technology for Underground Construction

Our commitment is the detail that makes the difference.

Reliable technology and expertise for underground construction • Alkali-free set accelerators and admixtures for shotcrete • Products for mechanized tunneling: foaming agents for soil conditioning, polymers, sealants and lubricants • Products for grouting and consolidation • Products for concrete repairing, protection and coating • Products for waterproofing: synthetic waterproofing membranes and waterproofing accessories

Discover the world of MAPEI: Visit www.utt-mapei.com or email us at [email protected]

MAPEI USA

18-2396 Ad_Revise_Tunneling_and_Underground_Construction_Dec.indd 1 11/13/18 11:50 AM exhibitors Design Richway Industries RST Instruments Ltd. with Richway Industries is the premier manufacturer of RST Instruments’ fully integrated suite of geotechnical equipment and foam concentrate for the production monitoring sensors gives our clients the reliable, re- Vision of cellular concrete. With equipment capable of pro- al-time data they need to save time, money and, most ducing up to 100 yards per hour, it’s ASTM C869 foam importantly, reduce risk at every stage of their proj- concentrate, and over 40 years of foam generation and ects. For over 40 years, we’ve been a trusted partner Build manufacturing experience, Richway can help with all to engineers, consultants and contractors, providing of your cellular concrete needs. Because foam con- engineered instrumentation, custom solutions and with centrate formulation & production, as well equipment matchless industry expertise to keep clients’ projects– design & production, are done in our own facility, we and reputations–safe. Integrity can also provide solutions for other aspects of your business. Richway knows foam and equipment. Products & Services Control Systems Products & Services Engineering Design and Services for Tunnels Grouting Services, Equipment and Materials Geological, Geotechnical Services and Equipment Tunnel Boring Equipment Instrumentation Equipment and Services Tunnel Lining and Support Materials Tunnel Communication Systems and Equipment Underground Excavation Services and Equipment Main Office Main Office 11545 Kingston St 504 N Maple Maple Ridge, BC V2X 0Z5 Canada Janesville, IA 50647 United States of America Phone: (604) 540-1100 Phone: (319) 987-2976 Email:[email protected] www.richway.com www.rstinstruments.com Robbins Ruen Drilling, Inc What’s in a name? For starters, the Robbins name Ruen Drilling provides drilling services including sur- carries on the heritage of always pushing beyond the face, underground, and horizontal directional core toughest challenges. And though we’re proud of the drilling for the geotechnical, exploration and geother- legacy that the Robbins name represents, we’re ulti- mal industries throughout the U.S., South America and mately focused on the future of the underground indus- Asia. Drilling equipment includes truck, track, skid, and try. Our name represents an ongoing commitment to helicopter supported core drills. Rig capacities are to never back down, always push ahead, and continue to 10,000 ft. vertical or angle and 3,000 ft. horizontal. work side by side with our partners and customers to Crews are all trained in achieving a high degree of core realize the next era of underground accomplishments. recovery for the client. Recent projects include: Dev- We’re proud to say that Robbins is still the most trusted ils Slide Tunnel, Irvington Tunnel, Caldecott Tunnel 4th name in tunneling. bore, Route 9 Tunnel in Hong Kong, Highway 53 Tun- nel in Puerto Rico, White Sands Missile Range and Mt. Products & Services Olympus Pipeline No. 6. Conveyor Equipment and Systems Earth Pressure Balance Machines Products & Services Mining Equipment Drilling Services and Equipment Rock TBM’s Soft Ground Shields Main Office Tunnel Boring Equipment 2320 River Rd Clark Fork, ID 83811 United States of America Main Office Phone: (209) 988-4261 29100 Hall St www.ruendrilling.com Solon, OH 44139 United States of America UNDERGROUND Phone: (440) 248-3303 ENGINEERING www.RobbinsTBM.com McMillen Jacobs Associates brings decades of highly Rocvent Inc technical expertise in engineering, environmental, and construction Products & Services services to any transportation, Dust and Fume Control Technology water, wastewater, hydropower, Ventilation Systems, Materials and Equipment Sandvik Mining and Rock and heavy civil project. Main Office Solutions 55 Magill Sandvik Mining and Rock Solutions is a business area Lively, ON P3Y1K6 Canada within the Sandvik Group and a global leading suppli- Phone: (705) 692-5854 er of equipment and tools, parts, service and technical Email:[email protected] solutions for the mining and construction industries. www.rocvent.com Application areas include rock drilling, rock cutting, loading and hauling, tunneling and quarrying. In 2020, mcmjac.com sales were approximately 37 billion SEK with about 12,500 employees within continuing operations.

30 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 exhibitors

SOLVING YOUR UNDERGROUND CHALLENGES Our customers shape the future. By listening to their needs and challenges, we have developed a complete and comprehensive offering for the tunneling industry. We continue to focus our R&D efforts on safe, sustainable, innovative solutions for tomorrow’s challenges. www.master-builders-solutions.com/ en-us/products/mining-and-tunneling

Photo credit: Catherine Bassetti Photography ® registeredSHOWGUIDE trademark ofexhibitor a MBCC listingsGroup member as of May in many 05, countrie2021 s of the world 2021 RETC ShowGuide 31 exhibitors

Products & Services SEALABLE Solutions GmbH Senceive Ltd Drilling Services and Equipment Senceive wireless remote condition monitoring tech- Mining Equipment (formerly Datwyler Sealing nology is used in 35 countries in civil engineering, Roadheaders mining, rail and more. Our precise, reliable and robust Rock Drills Technology) SEALABLE Solutions GmbH previously DATWYLER products are built to empower clients responsible for high value and safety-critical assets. Senceive users Main Office Sealing Technologies is the world leading provider of tunneling gaskets. Datwyler will no longer sell tunnel installed more than 30,000 sensors last year – helping 3200 Highlands Pkwy SE, Ste 200 gasket and SEALABLE took over this business by man- them manage ground and structural movement, land- Smyrna, GA 30082 United States of America agement-by-out. SEALABLE will continue business as slide risk, geotechnical behavior, rail track movement Phone: (470) 271-1000 we did with PHOENIX PDT Profiles. SEALABLE has more and more. Underground applications include tunnel rocktechnology.sandvik than 750 successful references on five continents and construction and maintenance, props and temporary offers a full range of gasket profiles and material op- works and third party assets. Systems are installed Schnabel - SWS tions for your tunnel project. SEALABLE manufacture all in minutes and last more than a decade with minimal Schnabel and SWS have decided to seek opportunities types of gaskets to meet all segmental tunnel speci- maintenance – helping you mitigate engineering risk together on infrastructure and underground projects in fications: mono EPDM, hydrophilic, Co-ex Swell/Com- without visiting site. the United States, to offer the market the strength of posite Black Swell and anchored gasket. SEALABLE their combined resources and experiences. This alli- known for their support and experience for segmental Products & Services ance will provide state-of-the-art site investigation, de- lining gasket projects. Geological, Geotechnical Services and Equipment sign, value engineering and construction management Instrumentation Equipment and Services services for underground transportation and water Products & Services Survey Equipment and Lasers projects throughout North America. Precast Concrete Linings Rail Products Main Office Products & Services Segment Accessories 68 Jay St, Ste 201 Underground Excavation Services and Equipment Tunnel Lining and Support Materials Brooklyn New York, NY 11201 United States of America Main Office Main Office Email:[email protected] 12720 Hillcrest Rd, Ste 585 Eisenacher Landstrasse 70 www.senceive.com Dallas, TX 75230 United States of America Waltershausen, D-99880 Germany Phone: (972) 250-3322 Phone: +1 (732) 763-6203 Shaft Drillers International schnabel-sws.com Email:[email protected] www.seal-able.com Main Office 130 Meadow Ridge Rd Ste 23 Mount Morris, PA 15349 United States of America Phone: (304) 291-0175 Email:[email protected] www.shaftdrillers.com Shannon & Wilson, Inc Since 1954, Shannon & Wilson has been a pioneer in developing effective underground solutions to complex project development problems. This includes explora- tion, design, plans and specifications, and construction management and support on over 800 soil and rock tunnel projects, ranging from trenchless to the world’s largest diameter tunnels. Resources include over 300 staff from the corporate headquarters in Seattle, Wash- ington, and branch offices in Alaska, California, Colo- rado, Florida, Illinois, Missouri, Oregon, Utah, Washing- ton and Wisconsin. Shannon & Wilson offers services in geotechnical site evaluations, and assessments of tunnels and related structures, groundwater and dewa- tering, seismicity, instrumentation, environmental, and natural resources.

EOE/AA/M/F/D/V Infrastructure. Delivered. Whether building new or maintaining existing, we enhance North America’s infrastructure. It takes strength, adaptability, and the alignment of your goals and ours. Challenging projects require the dedication and skill of true pioneers. That’s what we deliver. An Energy & Infrastructure Contractor www.Michels.us

32 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 MILLER SHAFT DIVISION

We at MILLER have a great team of highly trained men in our shaft division. We have the ability to sink shafts conventionally from 16’ diameter and larger to depths of 1,600 ‘ or greater. We utilize nontraditional mucking methods that give us an edge on both safety and productivity. We own three raise bore machines with the capacity to do shafts as small as 48” diameter with our Atlas Copco 73R and as large as 26’ diameter with both of our Herrenknecht RBR400s and up to 2,400’ deep. We offer steel lining or cast in place concrete lining. We also offer pilot hole guidance to ensure tight tolerances are attained on holt deviations for elevators, man and material hoist, or emergency escape hoist applications. A MILLER shaft is not just another hole in the ground, it is a finely crafted structure that the owner can use and be proud of! Please give us the opportunity to do one/another one for you! At MILLER, we strive to bring the best value to our customer’s projects with fair prices, superb service, and outstanding quality, all delivered by an honest hard- working team of professionals. We are committed to seeing that our values are a part of every project we do. We strive to practice the highest levels of intigrity with all persons involved and praise God in every interaction.

Please contact us with your shaft needs! Check us out on our website: millercontracting.us exhibitors

Products & Services Main Office products include membranes, waterstops and drainage Consulting Engineers PO Box 3274, 1431 Miner St systems. Full service sales and technical offices sup- Consulting Environmental Idaho Springs, CO 80452 United States of America port our customers nationwide. Engineering Design and Services for Tunnels Phone: (303) 567-4871 Geological, Geotechnical Services and Equipment Email:[email protected] Products & Services Ground Improvement Equipment and Services www.shotcretetechnologies.com Concrete Reinforcement Instrumentation Equipment and Services Grouting Services, Equipment and Materials Lubricants for TBM Main Office Precast Concrete Linings 400 N 34th St, Ste 100 Shotcrete Equipment, Supplies, and Services Seattle, WA 98103 United States of America Soil Conditioning Equipment and Materials Phone: (206) 695-6794 Email:[email protected] Main Office www.shannonwilson.com 201 Polito Ave Lyndhurst, NJ 07071 United States of America Phone: (201) 933-8800 Shotcrete Technologies, Inc usa.sika.com STI has been providing innovative Shotcrete products and services to the mining and tunneling industry for over 30 years with our Shot-Tech Robotic Arm - mount- Simem Underground Solutions, ed on many types of carriers and our industry standard Sika Corporation Inc STI Alkali Free and Shotset 250 Liquid Accelerators. STI Sika Corporation is a global specialty chemicals com- The team at Simem Underground Solutions has over also has new shaft lining (vertical lining) technology. pany with over 100 years of experience. For tunneling, 30 years experience providing fully automated mate- STI’s knowledgeable team of professionals can pro- Sika offers a wide variety of products such as chemical rial handling systems for TBM bi-component grout, hy- vide everything from a Shotcrete System design, mix admixtures and fibers for concrete, repair and protec- drated bentonite, lightweight cellular grout, shotcrete, design, to testing and training based on your specific tion products, waterproofing products and equipment concrete, mining backfill. and water filtration. SUG needs from mega projects to small mines. for shotcrete. Sika’s product line for chemical admix- manufactures colloidal mixers, pumping and delivery tures includes a full range of admixtures and concrete systems, as well as the automation and controls pack- Products & Services reinforcement fibers, useful for cast-in-place concrete, age. Concepts are specifically tailored to the customer’s Tunnel Lining and Support Materials precast concrete and shotcrete. Sika’s repair products needs and include complete engineering, design and include grouts, mortars, adhesives, sealants and struc- fabrication of all mechanical, structural and electrical tural strengthening systems, and Sika’s waterproofing systems. Services range from preliminary engineering

IF IT ROLLS ON RAILS, WE’VE GOT YOU COVERED.

Completely rebuilt and repowered Plymouth 25 ton locomotive, flat cars and muck cars work on SAK’s Deer Creek project in St. Louis, Missouri.

LOCOMOTIVES ROLLING STOCK HEAD OFFICE +1 (970) 259-0412 JETAIR VENTILATION SYSTEMS

EUROPEAN OFFICE MINE HOISTS & STAGE WINCHES +49 (6061) 97969-30 METALLIANCE MSVs MININGEQUIPMENTLTD.COM (NORTH AMERICAN, GERMAN DEALER)

34 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 exhibitors and case studies through to hands-on commissioning Main Office Southern Nevada Water and field training with complete CAD documentation via F.Serpero 4F1 and support. Masate, MI 20060 Italy Authority Phone: 00393409958978 Products & Services www.sisgeo.com Main Office Concrete Mixing and Transportation Equipment 100 City Pkwy, Ste 700 Ground Improvement Equipment and Services Las Vegas, NV 89106 United States of America Grouting Services, Equipment and Materials SoilFreeze Inc Phone: (702) 204-9632 SoilFreeze Inc. provides temporary frozen soil shoring Precast Concrete Linings Email:[email protected] systems to support excavations and provide ground- Pumps and Pumping Equipment www.snwa.com Shotcrete Equipment, Supplies, and Services water cut-off. Our technology can be used for; ground water cut-off, in situ-isolation barriers, foundation ex- Main Office cavation shoring, cross passages, adits, ground stabili- Spendrup Fan Co 1A - 30528 Great Northern Ave zation and more… Since 1968, Spendrup Fan Co. has designed and man- Abbotsford, BC V2T 6H4 Canada We design, fabricate, install and maintain customized ufactured quality vane axial fans and accessories for all Phone: (604) 621-7008 freeze systems for each client’s needs. We serve both types of mining and industrial applications. Spendrup Email:[email protected] the private and public sectors and have a substantial fans are designed to withstand the harshest environ- www.simemug.com list of successful projects and satisfied clients. Soil- ments. Fan casings are made of 5/16” steel. Impeller Freeze Inc. has advanced and refined freeze technology hubs are fabricated from mild steel. Impeller blades are to create freeze systems that are mobile, reusable, and 356-T6 hardness, to resist highly abrasive conditions. SISGEO SRL expandable to address the needs of any sized project Spendrup Fan Co. designs fans to meet client specifica- and urban locations. tions. Spendrup Fan can meet client needs, from MSHA Products & Services Sch. 2-G, U/L approved explosion proof, marine duty, to Drilling Services and Equipment Products & Services fans that provide trouble-free service in high-tempera- Engineering Design and Services for Tunnels Ground Freezing ture or corrosive environments. Fabrication Materials Geological, Geotechnical Services and Equipment Main Office Products & Services Instrumentation Equipment and Services 5931 238th St SE, Ste 201 Dust and Fume Control Technology Rail Products Woodinville, WA 98072 United States of America Tunnel Boring Equipment Shotcrete Equipment, Supplies, and Services Phone: (206) 261-0733 Ventilation Systems, Materials and Equipment Email:[email protected] www.soilfreeze.com

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 35 exhibitors

Main Office Products & Services try-leading engineering and logistics. Additionally, the PO Box 4308 Steel Pipe Pressure Pipeline Services team offers 24-hour sup- Grand Junction, CO 81502 United States of America port. Thompson Pipe Group has nearly a dozen loca- Phone: (970) 243-3429 Main Office tions and almost 1,500 employees. www.spendrupfanco.com 3301 Zachary Ave Shafter, CA 93263 United States of America Main Office Phone: (855) 535-1555 1003 MacArthur Blvd www.tbmsupply.com Grand Prairie, TX 75050 United States of America Phone: (469) 313-2569 Email:[email protected] Terratec www.thompsonpipegroup.com Incorporated in 1990, Terratec is a world renowned Australian designer and manufacturer of Tunnel Boring Machines, Raise Boring Machines, Conveyor Systems TLT-Turbo and other custom-made products for tunneling and TLT-Turbo North America is an industrial ventilation mining. Kelley Engineered Equipment has been de- fan manufacturer, including engineering, development, signing and building bespoke tunneling solutions since manufacturing, repair, and service. Experience and 2007 and now also of represents Terratec in the USA specialization is in Tunnel & Metro, Mining, Wind tunnel, Strata Worldwide and Canada Industrial, MVR Fans, Power station, and Aftermarket service. Products & Services Products & Services Conveyor Equipment and Systems Products & Services Safety Products Earth Pressure Balance Machines Ventilation Systems, Materials and Equipment Shotcrete Equipment, Supplies, and Services Engineering Design and Services for Tunnels Tunnel Communication Systems and Equipment Microtunneling Equipment, Tools, and Supplies Main Office Mining Equipment 2693 Wingate Ave Main Office Tunnel Boring Equipment Akron, OH 44314 United States of America 8800 Roswell Rd, Ste 145 Phone: (330) 776-5115 Sandy Springs, GA 30350 United States of America Main Office Email:[email protected] Phone: (770) 321-2500 9829 S 168th Ave, Ste 4C www.tlt-turbo.com Email:[email protected] Omaha, NE 68136 United States of America www.strataworldwide.com Phone: (206) 412-4234 Email:[email protected] Towill, Inc TBM Supply www.terratec.co & www.keellc.com Supplier factory new, used and surplus , carbon, stain- Main Office less and PVC: pipe, valves, fittings. Grooved, Threaded, Thompson Pipe Group 2300 Clayton Rd, Ste 1200 Flanged, Welded. Thompson Pipe Group is one of the largest pipe man- Concord, CA 94520 Domestic, DIN, JIS replacement including actuation. ufacturers in North America. The California-based (925) 682-6976 company offers the widest range of precast, pressure https://www.towill.com and trenchless pipe solutions in the U.S., plus indus-

36 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021

exhibitors

TPH Bausysteme GmbH Products & Services Tunnel Radio of America, Inc Pumps and Pumping Equipment Main Office Products & Services Nordportbogen 8 Main Office Dust and Fume Control Technology Norderstedt 22848 Germany 1625 Fullerton Ct Safety Products Phone: +49 40 5 29 06 67 80 Glendale Heights, IL 60139 United States of America Tunnel Communication Systems and Equipment Email:[email protected] Phone: (630) 793-0127 www.tph-bausysteme.com www.tsurumipump.com Main Office 6435 Hyslop Rd Trinity Products LLC Tunnel Business Magazine Corvallis, OR 97330 United States of America Phone: (541) 758-5637 Main Office (TBM) Email:[email protected] www.tunnelradio.com 1969 W Terra Ln TBM: Tunnel Business Magazine provides the North O’Fallon, MO 63366 United States of America American tunneling industry with a trade magazine Phone: (636) 887-9689 focusing on North American topics, projects and news. From large diameter tunneling to microtunneling, Tun- Tunneling Journal www.trinityproducts.com Tunnelling Journal delivers unrivalled editorial quality nel Business Magazine, published by Benjamin Media, that features contemporary, lively, cutting edge articles Inc., reports on the issues and topics important to the with specific and unparalleled relevance to the tunnel- Tsurumi Pump North American tunneling contractor, engineer and ling contractor, consultant, client and machine manu- Tsurumi Pump is a submersible pump manufactur- owner. Free subscriptions are available. facturer. Published six times a year, the print copy is er that supplies pumps worldwide for many projects partnered with a constantly updated website and a fort- including tunneling. Tsurumi pumps are capable of Products & Services nightly newsletter. We also publish Breakthrough mag- handling flows from 50-5000 gpm @ heads up to 750 Educational azine for the ITA Young Members, ITA Activity Report, feet. Wear parts are made of wear resistant materials Publishers Australasian Tunnelling Society Journal, and organisers capable of handling entrained solids commonly found of the British Tunnelling Society Conference, and the in tunneling applications. Pump features such as dual Main Office Cutting Edge Conference in partnership with SME. Visit inside mechanical seals that do not require cooling 10050 Brecksville Rd our booth to pick up your complimentary copies of all from or come in contact with the abrasive liquid being Brecksville, OH 44141 United States of America our magazines and meet the team. pumped is just one of the reasons Tsurumi Pump has Phone: (330) 467-7588 become the pump of choice in mines throughout the www.tunnelingonline.com world. Products & Services Educational Publishers

Main Office The Old Library, Dudley Rd Tunbridge , Kent TN1 1LE United Kingdom Phone: +44 (0) 1892 522 585 Email:[email protected] www.tunnellingjournal.com Tunnels & Tunnelling Celebrating 50 years of service to the tunnelling indus- try, and packed with information about the business its customers are in, Tunnels & Tunnelling remains the leading underground construction magazine worldwide. Since 1999 T&T offers T&T North America, a bi-monthly magazine dedicated to its customers’ regional market, and the official publication of the Tunnelling Association of Canada (TAC). Each edition of T&T informs tunnelling professionals on every aspect of underground con- struction in five continents. Readers include consulting engineers, clients, contractors and manufacturers in 90 countries. Stay abreast of all developments in the tun- nelling industry by subscribing to T&T. BY Products & Services Educational Publishers

Main Office John Carpenter House London EC4Y 0BS United Kingdom Phone: +44 (0) 20 7406 6584 800-456-7473 www.tunnelsonline.info TRINITYPRODUCTS.COM

38 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 parsons.com exhibitors

igation systems for driving equipment, its production and ISO 14001 standards. In addition, in-house quality TunnelTalk and logistics management system for segment produc- control tests are routinely performed along with tests Welcome to TunnelTalk - your gateway to tunneling tion and further innovative system solutions for safety, performed by independent laboratories. on the web. Designed specifically as a web publica- monitoring and data management play key roles here. tion, TunnelTalk brings industry news, views and video VMT products can be combined into efficient, modern, Products & Services reports directly to your internet device. A comprehen- networked solutions that ensure streamlined processes Tunnel Lining and Support Materials sive editorial Archive is complimented by our industry and seamless quality assurance for every tunnel proj- Directory, Diary Dates, Job Opportunities, Equipment ect. Main Office Sales and Procurement notices. Free weekly e-Alerts 700 9E Rue drive traffic to the site and, for industry advertisers, our Products & Services Thetford Mines, QC G6G 6Z5 Canada readers are your next customers! Instrumentation Equipment and Services Phone: (418) 335-3202 Laser Guidance Systems Email:[email protected] Products & Services Microtunneling Equipment, Tools, and Supplies www.fiberglassrebar.com Educational Roadheaders Publishers Survey Equipment and Lasers Tunnel Boring Equipment Williams Form Engineering Main Office 21001 N Tatum Blvd, Ste 1630-274 Corp Main Office Williams Form Engineering Corporation has been pro- Phoenix, AZ 85050 United States of America 1613 132nd Ave E, Ste 200 viding threaded steel bars and accessories for rock, soil Phone: + 1 (602) 399-7184 Sumner, WA 98390 United States of America and concrete anchors, post-tensioning systems, and Email:[email protected] Phone: (253) 447-2399 concrete forming hardware systems in the construction www.TunnelTalk.com Email:[email protected] industry for over 90 years. www.vmt-us.com Our rock and soil anchor product line includes our Spin- VMT USA Lock mechanical rock anchors, polyester resin anchors, As a driving technological force for more than 25 V-ROD multiple corrosion protection anchors, soil nails, strand years, VMT has the experience, the capacities and the V•ROD composite rebar has been manufactured by anchors, Manta Ray soil anchors, Geo-Drill Hollow-Bar know-how to develop innovative system and product Pultrall since 1987. Pultrall manufactures V•ROD re- anchors, micro piles. For concrete anchoring we offer solutions that support construction companies all over bars by combining the pultrusion process and an in-line Spin-Lock anchors, undercut anchors, reusable an- the world to build tunnels and shafts of every size for coating process for the outside, sanded surface. The chors and cast-in-place anchors. We also have a full ever more complex infrastructure projects: VMT’s nav- company’s manufacturing processes meet ISO 9001 line of All-Thread Rebar for tie backs, micro piles and post-tensioning.

Driving Progress in Tunnel Projects.

RETC 2021 Las Vegas June 13 - 16 Visit us!

Guided by VMT. Lowering costs and improving effi ciency in modern tunnel construction. With smart modular solutions from VMT. Precise navigation, full documentation and reliable data managment will give you that crucial advantage. Find out more.

www.vmt-gmbh.de

40 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 OVER 100 YEARS UNDERGROUND THAT’S BUILDING TRUST NOW PROUDLY EXPANDING OUR EXPERTISE IN NORTH AMERICA

For more than a century, Sika has been pioneering underground construction and continues to be involved with the most challenging tunneling and mining projects ever built. We will continue forging ahead to bring modern day shotcrete, tunneling and mining technologies a step above the rest.

Focused on the entire North American continent, our Sika Shotcrete, Tunneling and Mining team incorporates the credibility of King Shotcrete with the global experience of Sika. Speak to one of our technical representatives today regarding our comprehensive portfolio of products: Shotcrete; Concrete; Grout; Paste Backfill; Sika® Aliva® Equipment; Asset Maintenance; Infrastructure Repair.

Visit us on usa.sika.com

SIKA CORPORATION - STM - NORTH AMERICA Phone: 800 933 7452 · usa.sika.com

©2020 SIKA Corporation. All rights reserved. exhibitors

Products & Services Products & Services ed tunnels in the world, including tunnels built in hard Concrete Reinforcement Geological, Geotechnical Services and Equipment rock, soft ground or mixed-face conditions, and using Geological, Geotechnical Services and Equipment Instrumentation Equipment and Services mining, boring, jacking, cut-and-cover, and immersed Ground Improvement Equipment and Services Mining Equipment tunnel technology. Projects include the Second Avenue Soil Conditioning Equipment and Materials Rail Products Subway in New York City; the Stockholm City Line; the Steel Pipe Safety Products Eurasia tunnel in Istanbul; and San Francisco’s Central Survey Equipment and Lasers Subway. WSP employs 42,000 professionals in 550 of- Main Office fices across 40 countries. 8165 Graphic Dr Main Office Belmont, MI 49306 United States of America 1900 Avenue of the Stars, Ste 2430 Main Office Phone: (616) 866-0815 Los Angeles, CA 90067 United States of America One Penn Plz, 2nd Floor Email:[email protected] Phone: (323) 395-5120 New York, NY 10119 United States of America www.williamsform.com Email:[email protected] Phone: (212) 465-5000 www.worldsensing.com www.wsp.com Worldsensing Loadsensing is the leading industrial monitoring solu- Zitron USA tion by IoT pioneer Worldsensing. Loadsensing enables near real-time data acquisition of geotechnical, geo- Main Office spatial and structural sensors as well as remote device, PO Box 2668 data and network management. Beckley, WV 25802 United States of America Engineers and experts tasked with industrial asset Phone: (304) 253-0777 monitoring can now capture sensor data through Load- Email:[email protected] sensing edge devices and send information to the cloud Www.Zitron.com/us for 24/7 connectivity management. With over 1,000 network deployments connecting over 170,000 sen- sors around the globe, Loadsensing is rapidly becom- WSP ing the new standard within industries such as mining, WSP is a leader in tunneling and underground con- construction, and rail. struction, from San Francisco to Stockholm. The firm has participated in the design and construction of some of the longest, largest, deepest, and most complicat-

A New Website for a New Generation of Underground Engineers

Down for That encourages Share the excitement and reward of a career underground. engineering students to pursue a undergroundcareers.org career in underground construction and tunneling by providing students Together we’ll grow the underground workforce. and professors with introductory industry information including: • Resource Library • Tunnel Tours • Industry Profiles • Presentations • Case Studies

42 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 exhibitors

Structural Shoring. Groundwater Cutoff.

Access Shafts Cross Passages Break In/Out

5931 238th ST SE #201 • Woodinville, WA 98072

SHOWGUIDE exhibitor listings as(206) of May 05, 2021420 -2759 • www.soilfreeze.com 2021 RETC ShowGuide 43 products & services

Concrete Mixing and Drilling Services and Engineering Design and Transportation Equipment Equipment Services for Tunnels Simem Underground Solutions, Crux Subsurface, Inc AECOM Inc HyperSciences, Inc Bekaert Ruen Drilling, Inc Dibit Measuring Technique USA, Concrete Reinforcement Sandvik Mining and Rock Solu- Inc BarChip Inc tions Dr. Sauer & Partners Corp Bekaert SISGEO SRL Geocomp Corp/GeoTesting Ex- MAPEI Corp press, Inc Sika Corporation Dust and Fume Control Gomez International, Inc Williams Form Engineering Corp Technology HNTB Corp ABC Industries, Inc Construction - Contracting Measurand Inc Englo, Inc, DBA Engart, Inc Services MSP Structures Inc Grydale USA Parsons Ballard Marine Construction Matrix Design Group RST Instruments Ltd. Crux Subsurface, Inc Rocvent Inc Shannon & Wilson, Inc Dibit Measuring Technique USA, Spendrup Fan Co SISGEO SRL Inc Tunnel Radio of America, Inc Terratec EC Applications - Tunnel Lining Earth Pressure Balance Environmental Control Consulting Engineers Machines Equipment and Supplies AECOM Herrenknecht Tunnelling Sys- Innovative Wireless Technologies Dr. Sauer & Partners Corp tems USA, Inc IoT Automation Geocomp Corp/GeoTesting Ex- Master Builders Solutions Matrix Design Group press, Inc Robbins Gomez International, Inc Terratec Fabrication Materials Hager-Richter Geoscience, Inc Gomez International, Inc MSP Structures Inc Educational SISGEO SRL Parsons Colorado School of Mines - Un- Pipe Me In derground Construction and Geological, Geotechnical Shannon & Wilson, Inc Tunnel Engineering Degree Services and Equipment Northwest Laborers-Employers AECOM Consulting Environmental Training Trust Crux Subsurface, Inc Hager-Richter Geoscience, Inc Tunnel Business Magazine Dibit Measuring Technique USA, Shannon & Wilson, Inc (TBM) Inc Control Systems Tunneling Journal Geocomp Corp/GeoTesting Ex- IoT Automation Tunnels & Tunnelling press, Inc RST Instruments Ltd. TunnelTalk Geo-Instruments Geokon, Inc Conveyor Equipment and Electrical - Generator-Motor, Hager-Richter Geoscience, Inc Systems Wire-Cable IoT Automation Carroll Technologies Group CAB JENNMAR Civil Robbins Carroll Technologies Group Measurand Inc Terratec Gomez International, Inc Parsons Line Power RST Instruments Ltd. Pipe Me In Senceive Ltd Shannon & Wilson, Inc

44 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 products & services RETC June 13-16 This is Strata Tunneling. Las Vegas

StrataCONNECT ™

• Automation • Telemetry • Communication • Tracking

StrataPROTECT ™

• Proximity Detection • Collision Avoidance • Emergency Refuge Chambers • Gas Detection

StrataGEOTECH ™

• Shotcrete • Resins & Grouts • Waterproofing • Water Control • Pneumatic Pumps

800-691-6601 • [email protected] • www.strataworldwide.com

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 45

Strata-Tunneling-Mag-Show-Ad-21-full-p.indd 1 4/15/21 11:43 AM products & services

SISGEO SRL Instrumentation Equipment Epiroc Williams Form Engineering Corp and Services J.H. Fletcher & Co Worldsensing Carroll Technologies Group Line Power Crux Subsurface, Inc Measurand Inc Ground Freezing Dibit Measuring Technique USA, Robbins Bauer Foundation Corporation Inc Sandvik Mining and Rock Solu- Keller Geocomp Corp/GeoTesting Ex- tions SoilFreeze Inc press, Inc Terratec Worldsensing Ground Improvement Geo-Instruments Equipment and Services Geokon, Inc Precast Concrete Linings Avanti International Measurand Inc AGRU America, Inc CJGeo RST Instruments Ltd. Master Builders Solutions Crux Subsurface, Inc Senceive Ltd MSP Structures Inc DSI Tunneling LLC Shannon & Wilson, Inc SEALABLE Solutions GmbH Keller SISGEO SRL (formerly Datwyler Sealing Tech- Master Builders Solutions VMT USA nology) Shannon & Wilson, Inc Worldsensing Sika Corporation Simem Underground Solutions, Jet Grouting Equipment Simem Underground Solutions, Inc and Services Inc Williams Form Engineering Corp Keller Publishers Grouting Services, Equipment Laser Guidance Systems Tunnel Business Magazine (TBM) and Materials VMT USA Aerix Industries Tunneling Journal Avanti International Lighting Systems Tunnels & Tunnelling Bauer Foundation Corporation IoT Automation TunnelTalk ChemGrout, Inc Nightstick Pumps and Pumping CJGeo Equipment Crux Subsurface, Inc Lubricants for TBM DSI Tunneling LLC MAPEI Corp Avanti International Keller Master Builders Solutions ChemGrout, Inc MAPEI Corp Sika Corporation Gomez International, Inc Master Builders Solutions Simem Underground Solutions, Microtunneling Equipment, Inc Nicholson Construction Co Tools, and Supplies Normet Americas, Inc Tsurumi Pump Herrenknecht Tunnelling Sys- Renesco Inc tems USA, Inc Rail Products Richway Industries HyperSciences, Inc Brookville Equipment Corp Sika Corporation Pipe Me In JENNMAR Civil Simem Underground Solutions, Terratec SEALABLE Solutions GmbH Inc VMT USA (formerly Datwyler Sealing Tech- Hoists and Headframes nology) Mining Equipment Carroll Technologies Group SISGEO SRL ABC Industries, Inc Worldsensing Hydraulic Hammers and Drills Brookville Equipment Corp Roadheaders Epiroc CAB Dräger Antraquip Corp

46 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 A proud heritage of innovative thinking.

Moving forward, one tunnel at a time.

We’re proud of the legacy that the Robbins name represents, but more importantly we’re focused on the future of the underground industry and the success of our client partners today. Join us in realizing the next era of underground accomplishments.

A GLOBAL TBM COMPANY / ROBBINSTBM.COM products & services

Sandvik Mining and Rock Solu- Shotcrete Equipment, Supplies, tems USA, Inc tions and Services HNTB Corp VMT USA Bekaert HyperSciences, Inc Messinger Bearings Rock Drills MAPEI Corp Master Builders Solutions Richway Industries Epiroc Robbins J.H. Fletcher & Co Sika Corporation Simem Underground Solutions, Spendrup Fan Co Sandvik Mining and Rock Solu- Terratec tions Inc SISGEO SRL VMT USA Rock TBM’s Strata Worldwide Tunnel Communication Herrenknecht Tunnelling Sys- Slurry Services and Machines Systems and Equipment tems USA, Inc Carroll Technologies Group Robbins Keller MAPEI Corp HNTB Corp Rotary Drum Cutters Innovative Wireless Technologies Soft Ground Shields Antraquip Corp IoT Automation Epiroc Herrenknecht Tunnelling Sys- Measurand Inc tems USA, Inc RST Instruments Ltd. Safety Products Robbins Strata Worldwide CAB Tunnel Radio of America, Inc Soil Conditioning Equipment Carroll Technologies Group Tunnel Haulage Systems Dräger and Materials HYTORC, Division of Unex Geocomp Corp/GeoTesting Ex- HNTB Corp press, Inc Corp Tunnel Lining and Support MAPEI Corp Innovative Wireless Technologies Materials IoT Automation Sika Corporation ABC Industries, Inc Nightstick Williams Form Engineering Corp AGRU America, Inc Strata Worldwide Steel Pipe Antraquip Corp Tunnel Radio of America, Inc JENNMAR Civil Bekaert Worldsensing Naylor Pipe Co Bessac Scaling TBM Supply DSI Tunneling LLC Antraquip Corp Williams Form Engineering Corp EC Applications - Tunnel Lining Everest Equipment Co J.H. Fletcher & Co Survey Equipment and Lasers HNTB Corp Segment Accessories Dibit Measuring Technique USA, JENNMAR Civil MSP Structures Inc Inc MSP Structures Inc SEALABLE Solutions GmbH Senceive Ltd Normet Americas, Inc (formerly Datwyler Sealing Tech- VMT USA Pipe Me In nology) Worldsensing Renesco Inc Richway Industries Shaft Drilling and Raiseboring Tunnel Boring Equipment SEALABLE Solutions GmbH Equipment Antraquip Corp Ballard Marine Construction (formerly Datwyler Sealing Tech- Herrenknecht Tunnelling Sys- nology) tems USA, Inc Bessac Epiroc Shotcrete Technologies, Inc JENNMAR Civil V-ROD Keller Gomez International, Inc Herrenknecht Tunnelling Sys-

48 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 products & services

Underground Excavation Services and Equipment Antraquip Corp Bekaert Englo, Inc, DBA Engart, Inc Richway Industries Schnabel - SWS additional RETC Supporters Underground Locomotives and Rail Haulage Equipment Brookville Equipment Corp Underground Utility Materials and Operations Avanti International CAB HOBAS Pipe USA Pipe Me In Ventilation Systems, Materials and Equipment ABC Industries, Inc ABC Ventilation Systems CAB Englo, Inc, DBA Engart, Inc Epiroc Grydale USA HNTB Corp JENNMAR Civil Mining Equipment Ltd Mobile Air Rocvent Inc Spendrup Fan Co TLT-Turbo Wastewater Management Products HOBAS Pipe USA Water Treatment Plant and Materials AGRU America, Inc HOBAS Pipe USA

SHOWGUIDE exhibitor listings as of May 05, 2021 2021 RETC ShowGuide 49 exhibitor listing & bOOTH NUMBER

Thank you to our 2021 RETC Exhibitors

ABC Industries, Inc 907 H + E Logistik GmbH 327 RST Instruments Ltd. 526 ABC Ventilation Systems 131 Hager-Richter Geoscience, Inc 516 Ruen Drilling, Inc 702 AECOM 142 Herrenknecht Tunnelling Sandvik Mining and Rock Solutions 504 Aerix Industries 708 Systems USA, Inc 429 Schnabel - SWS 128 AESTUVER - ECO Tunneling 529 HNTB Corp 502 SEALABLE Solutions GmbH AGRU America, Inc 1002 HOBAS Pipe USA 319 (formerly Datwyler Sealing Antraquip Corp 508 HyperSciences, Inc 511 Technology) 134 Avanti International 130 HYTORC, Division of Unex Corp 108 Senceive Ltd 125 Ballard Marine Construction 909 Innovative Wireless Technologies 518 Shaft Drillers International 1004 BarChip Inc 515 IoT Automation 111 Shannon & Wilson, Inc 503 Bauer Foundation Corporation 146 J.H. Fletcher & Co 102 Shotcrete Technologies, Inc 419 Bekaert 425 JENNMAR Civil 136 Sika Corporation 143 Brookville Equipment Corp 309 Keller 138 Simem Underground Solutions, Inc 706 CAB 311 Line Power 417 SISGEO SRL 522 Carroll Technologies Group 106 MAPEI Corp 1000 SoilFreeze Inc 525 Cell-Crete Corporation 403 Master Builders Solutions 700 Southern Nevada Water Authority 409 ChemGrout, Inc 903 Matrix Design Group 100 Spendrup Fan Co 528 CJGeo 512 Measurand Inc 527 Strata Worldwide 1008 Colorado School of Mines - Messinger Bearings 601 TBM Supply 607 Underground Construction and MILLER 103 Terratec 524 Tunnel Engineering Degree 126 Mining Equipment Ltd 427 Thompson Pipe Group 120 Crux Subsurface, Inc 505 Minova 501 TLT-Turbo 107 Dibit Measuring Technique USA, Inc 534 Mobile Air 147 Towill, Inc. 110 Dr. Sauer & Partners Corp 317 Mott MacDonald 901 TPH Bausysteme GmbH 301 Dräger 535 MSP Structures Inc 514 Trinity Products LLC 523 DSI Tunneling LLC 140 Naylor Pipe Co 510 Tsurumi Pump 530 EC Applications - Tunnel Lining 1006 Nicholson Construction Co 704 Tunnel Business Magazine (TBM) 509 Englo, Inc, DBA Engart, Inc 104 Nightstick 605 Tunnel Radio of America, Inc 401 Epiroc 139 Normet Americas, Inc 133 Tunneling Journal 144 FAMA srl 513 Northwest Laborers-Employers Tunnels & Tunnelling 603 Geocomp Corp/GeoTesting Training Trust 411 TunnelTalk 127 Express, Inc 325 Parsons 132 VMT USA 329 Geo-Instruments 137 Pipe Me In 500 V-ROD 536 Geokon, Inc 135 Renesco Inc 101 Williams Form Engineering Corp 905 GeoStructural Engineering Inc 303 Richway Industries 145 Worldsensing 537 Gomez International, Inc 609 Robbins 506 WSP 538 Grydale USA 124 Rocvent Inc 517 Zitron USA 119

50 2021 RETC ShowGuide R SHOWGUIDE exhibitor listings as of May 05, 2021 H + E Logistik GmbH 327 RST Instruments Ltd. 526 Hager-Richter Geoscience, Inc 516 Ruen Drilling, Inc 702 Herrenknecht Tunnelling Sandvik Mining and Rock Solutions 504 Systems USA, Inc 429 Schnabel - SWS 128 HNTB Corp 502 SEALABLE Solutions GmbH HOBAS Pipe USA 319 (formerly Datwyler Sealing HyperSciences, Inc 511 Technology) 134 SAVE THE DATE! HYTORC, Division of Unex Corp 108 Senceive Ltd 125 Innovative Wireless Technologies 518 Shaft Drillers International 1004 IoT Automation 111 Shannon & Wilson, Inc 503 J.H. Fletcher & Co 102 Shotcrete Technologies, Inc 419 JENNMAR Civil 136 Sika Corporation 143 Keller 138 Simem Underground Solutions, Inc 706 Line Power 417 SISGEO SRL 522 MAPEI Corp 1000 SoilFreeze Inc 525 Master Builders Solutions 700 Southern Nevada Water Authority 409 Matrix Design Group 100 Spendrup Fan Co 528 Measurand Inc 527 Strata Worldwide 1008 Messinger Bearings 601 TBM Supply 607 Expand your KNOWLEDGE MILLER 103 Terratec 524 Dive into a tailored, high-end, single-track Mining Equipment Ltd 427 Thompson Pipe Group 120 program of subject-specifi c presentations Minova 501 TLT-Turbo 107 that focus on innovation and practical experience, as well as extended in-depth Mobile Air 147 Towill, Inc. 110 industry discussion sessions. Mott MacDonald 901 TPH Bausysteme GmbH 301 Professional NETWORKING MSP Structures Inc 514 Trinity Products LLC 523 Energize friendships with longtime Naylor Pipe Co 510 Tsurumi Pump 530 Where Innovation colleagues, forge new connections, Tunnel Business Magazine (TBM) 509 and exchange ideas with fellow industry Nicholson Construction Co 704 leaders from around the world. Nightstick 605 Tunnel Radio of America, Inc 401 Normet Americas, Inc 133 Tunneling Journal 144 Meets Practical Learn from INDUSTRY LEADERS Leading international tunneling companies Northwest Laborers-Employers Tunnels & Tunnelling 603 attend Cutting Edge, sharing the latest in Training Trust 411 TunnelTalk 127 Experience technology, innovations and safety. Parsons 132 VMT USA 329 Pipe Me In 500 V-ROD 536 Renesco Inc 101 Williams Form Engineering Corp 905 Richway Industries 145 Worldsensing 537 ucaofsmecuttingedge.com Robbins 506 WSP 538 Rocvent Inc 517 Zitron USA 119

UPCOMING TUNNELING CONFERENCES

George A. Fox MINEXCHANGE 2022 North American Tunneling Conference SME Annual Conference & Expo Conference (NAT) 2022 January, 2022 February 27 – March 2, 2022 June 19-22, 2022 New York City, NY Salt Lake City, UT Philadelphia, PA

CALL for PAPERS

Abstracts are now being accepted! Share your knowledge with fellow attendees at NAT 2022.

Prospective authors should Topics for consideration include: submit the following by July 31, 2021: Tunnel Boring Machines Lining Design Advances Ground Conditioning Fire & Life Safety • Abstract of 100 words or less & Modi cation Rehabilitation • The topic to which it applies Equipment Automation Design • Complete author contact information NATM/SEM – Conventional Contracting Methods Tunneling Alternative Delivery Methods • Project name Caverns Financing Small Diameter Tunneling Labor Training Shaft Construction Key dates: Case Histories Emerging Technologies July 31, 2021 - Abstracts Due Future Projects Risk Management September 2021 - Notice of Acceptance Futuristic Tunneling

December 15, 2021 - Manuscripts Due Please submit online to NAT: sme-nat.secure-platform.com

For additional information on exhibiting, sponsorship or general inquiries, contact UCA Programs Department | 303-948-4223 | [email protected] | smenet.org

Visit natconference.org for more details about NAT2022. NO JOB TOO SMALL. Kiewit provides smart engineering, detailed Our typical small job services include: planning as well as right-sized equipment • Shotcrete and resources to all of its projects. As a local • Ground support – rockbolts and steel sets contractor with an expansive reach, Kiewit • Drill and blast excavation possesses the agility to react and mobilize • Rehabilitation of tunnel and shafts for any size tunnel project; big or small. • SEM excavation • Cast-in-place concrete lining • Civil infrastructure and mining projects

Kiewit Infrastructure Co. 1926 S 67th St., Suite 300, Omaha, NE 68106 | (402) 346-8535

KIEWIT.COM