Statement of Qualifications December 2020

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING Statement of Qualifications December 2020

JOHN JAMES AUDUBON BRIDGE - New Roads, Louisiana INNOVATIVE

CHRISTOPHER S. BOND BRIDGE - Kansas City, Missouri GEOTECHNICAL

PTTP TRANSMISSION LINE - Salt Lake City, Utah SOLUTIONS Columbus Crew Stadium Entrance 1 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Corporate Summary Dan Brown and Associates is a consulting engineering firm specializing in geotechnical and foundation engineering, with emphasis on problem solving relating to deep foundation and slope stability problems. The firm includes associates with special expertise in construction, design, testing, and research. Our services for deep foundations include design and construction issues for: • Drilled Shafts (Conventional and Base Grouted) • Auger Cast-in-Situ Piles (Conventional CFA and Drilled Displacement Piles) • Micropiles • Driven Piles While specializing in deep foundation systems and slope stability problems, we also provide services for a wide range of geotechnical applications. Our list of services includes: • Foundation analysis and design • Dynamic foundation analysis and design • Slope stability analysis and design • Earth retaining structure analysis and design • Design-Build project team support • Load testing program design, execution, interpretation, and application • Value engineering of foundation systems • Construction problem resolution • Foundation failure investigations and remediation design • Consulting for general geotechnical practitioners • Peer review for general geotechnical practitioners • Owner review of geotechnical services • Integrity testing evaluation • Expert witness • Short Courses, Seminars, Technical Presentations

US 231 Landslide Remediation- Lacey Springs, Alabama DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

2 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL

Company Officers

Mr. Tim Siegel, MSCE, P.E., G.E., D.GE (CEO) has a broad background in consulting on geotechnical site characterization, deep foundations, ground improvement, and slope stability with over 27 years of experience in the industry. During his 12 years with S&ME, he advanced from staff geotechnical engineer to technical principal and chief engineer while developing expertise in construction in karst, seismic design, numerical modeling, and specialty foundations and retaining systems. After leaving S&ME, he was a full-time geotechnical consultant with Berkel & Company Contractors, Inc., where he was involved in large deep foundation projects throughout the United States. While at Berkel, he led the development of the ground improvement technique using Berkel’s ground displacement technology. He has specialized expertise in geotechnical earthquake engineering and site response analysis, foundations in karst terrain, continuous flight auger piles and numerical modeling. His experience with geotechnical earthquake engineering includes site characterization and liquefaction analysis for the HAZUS earthquake preparedness study for the state of South Carolina as well as seismic studies and site response analyses at the Oak Ridge National Laboratories in Tennessee. He has developed foundation designs and sinkhole mitigation strategies for several large projects where karst conditions were present and has published extensively on his experience with ground improvement using drilled displacement piles and other technologies. He is past-chair of the Geo- Institute (formerly ASCE) Computational Geotechnics Committee and is a current member of the GI Award and Soil Improvement committees. He also serves on DFI’s Ground Improvement and Seismic and Lateral Loads committees. He was on the faculty of the University of Tennessee, Knoxville between 2002 and 2014. Mr. Siegel obtained bachelor and master degrees from Georgia Tech, and is a registered professional engineer in 30 states.

Mr. Paul Axtell, MSCE, P.E., D.GE (COO) has over 19 years of experience focusing primarily on foundation engineering and slope stability for large infrastructure projects. Past projects include design and construction of seismic retrofit strategies for large earthen dams involving ground improvement as well as design, construction, and testing of large foundations for major river bridge crossings throughout the United States. His recent work with DBA includes deep foundation design, testing, and construction of large diameter open-ended pipe piles and large diameter drilled shafts for the Christopher Bond Bridge in Kansas City, Missouri, a cable-stayed crossing of the Missouri River; the Lafayette Bridge in St. Paul, Minnesota, a steel box crossing DAN of the Mississippi River; the Stan Musial Veterans Memorial Bridge in St. Louis, BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

3 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Missouri, a cable-stayed crossing of the Mississippi River; the Hastings Bridge in Hastings, Minnesota, a free-standing tied-arch crossing of the Mississippi River; the Hurricane Deck Bridge near Camdenton, Missouri, a major crossing of the Lake of the Ozarks; the St. Croix Bridge near Stillwater, Minnesota, an extradosed bridge over the St. Croix River; and Sellwood Bridge over the Willamette river near Portland, Oregon. Commensurate with his broad geotechnical experience and background, Mr. Axtell has published nearly two dozen peer reviewed articles on a vast array of geotechnical topics ranging from soil dynamics to full-scale foundation load testing. He currently serves as Committee Chairman of the Deep Foundations Institute (DFI) Drilled Shaft Committee and is active within the organization. Mr. Axtell is a graduate of the University of Missouri and the University of Texas, and is a licensed professional engineer in Kansas, Missouri, Minnesota, and Wisconsin.

Mr. Robert Thompson, MSCE, P.E., D.GE (CFO) has a broad base of practical experience in geotechnical and foundation engineering and construction. Mr. Thompson received B.S. and M.S. Degrees in civil engineering from Auburn University. His experience includes over 27 years in consulting practice with Law Engineering, TTL, Inc., and Dan Brown and Associates. He has a wide variety of experience in geotechnical investigations and foundation design for a variety of projects. Since joining DBA his focus has been primarily transportation structures. Major projects include the Maryland Purple Line, Christopher S. Bond Bridge in Kansas City, Missouri, the Biloxi Bay Bridge in Biloxi, Mississippi, the Cumberland River Pedestrian Bridge in Nashville, Tennessee, and the I-15 Beck St. Bridge in Salt Lake City, Utah. Other projects include the GIWW West Closure Project and the LPV-145 project in New Orleans, Louisiana, the Hyundai manufacturing facility in Alabama, and the award-winning Riverwalk Stadium in Montgomery, Alabama. He has also taught soil mechanics and foundation engineering courses as an adjunct instructor at Auburn University and the University of Alabama at Birmingham. Mr. Thompson is licensed in nine states, He was a co-author of the FHWA Geotechnical Engineering Circular 8, Design and Construction of Continuous Flight Auger Pile (2007), and has published both peer-reviewed and general publication articles on foundation engineering topics.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

4 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Senior Principal Engineers

Dr. Dan Brown, Ph.D., P.E., P.Eng., D.GE (Chairman of the Board) has a distinguished career of practice, research, and instruction in the field of deep foundations with over 43 years of experience. Dr. Brown is a graduate of Georgia Tech (1977) and the University of Texas (PhD, 1985). He is considered an expert in deep foundation design for lateral and axial loading, load testing, and construction. He is the co-author (with Dr. Turner) of Drilled Shafts: Construction Procedures and LRFD Design Methods (2019), the FHWA manual on the design and construction of drilled shafts. He was also the co-developer and an instructor for the NHI drilled shaft design and construction course based on the manual. In addition to the drilled shaft manual, Dr. Brown was the lead author of FHWA Geotechnical Engineering Circular 8, Design and Construction of Continuous Flight Auger Piles (2007). He is a member emeritus and past chairman of the Geo-Institute (formerly ASCE) Deep Foundations Committee, a Past-President of the Deep Foundations Institute, an honorary member of ADSC: The International Association of Foundation Drilling and of the Pile Driving Contractors Association. Dr. Brown has received numerous awards, including the ASCE Martin Kapp Foundation Engineering Award for “improvements in the design and quality of drilled shaft construction,” the ASCE Huber Prize for Research for his work with pile groups and bridge foundations, the ADSC Outstanding Service Award, the Auburn University Gottlieb Professorship, the 2011 DFI Distinguished Service Award, and induction into the Moles Society. He is an active consultant on many large projects involving deep foundations, and known for his work in pile group behavior and in construction and testing of deep foundations. Dr. Brown was a member of the Civil Engineering faculty at Auburn University from 1987 - 2009 and is a licensed professional engineer in numerous states.

Dr. Erik Loehr, Ph.D., P.E. (Board Member) specializes in evaluating the stability and performance of earth slopes and earth retention systems, large- scale laboratory modeling and full-scale field evaluation of geotechnical engineering problems, performance of geotechnical composite systems, and computer applications in geotechnical engineering. Dr. Loehr is a senior principal engineer with over 31 years of experience and is leading DBA’s efforts in the analysis and design of slope stability projects, including the stabilization of the Alabama river at the Alabama Electric Cooperative Powerplant in Loman, AL and for a CSX railroad line in Missouri. His work includes research for agencies such as the National Science Foundation, the Missouri Department of Transportation, and the Federal Highway Administration, as well as fora DAN number of private contractors and companies. Recent projects include BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

5 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL evaluation of reticulated micropile systems for slope stabilization, development of techniques for using recycled plastic reinforcement for stabilization of surficial slope failures, behavior of fiber-reinforced soils, application of asset management principles to geotechnical engineering systems, reliability-based design of earth slopes and retaining structures, and application of Load and Resistance Factor Design (LRFD) to earth slopes. He is an active member of ASCE/Geo-Institute, ADSC: the International Association of Foundation Drilling, the Deep Foundations Institute, the International Society for Micropiles, and the Transportation Research Board. He is a recipient of an NSF CAREER Award and is a Distinguished Faculty Fellow in the MU College of Engineering. Dr. Loehr received his doctorate at the University of Texas (1998).

Mr. Barry Meyer, MSCE, P.E. (Board Member) has over 42 years of geotechnical engineering experience. Prior to joining Dan Brown and Associates in 2012, Mr. Meyer served in various engineering roles at McClelland Engineering, Marathon Oil Company, Leighton and Associates, Law Engineering, and HDR. A recognized expert in design and construction of deep foundations, he has designed large diameter high capacity piles for major offshore structures, including the Steelhead oil production platform in Cook Inlet, Alaska. This challenging project required the installation of driven and drilled pipe piles into dense glacial till. Mr. Meyer’s drilled shaft experience includes the H-3 Windward Viaduct on the Hawaiian island of Oahu. This was the first use of drilled shafts to support a major bridge structure in Hawaii, where drilled shafts are now the foundation of choice. Following the devastating 1994 Northridge earthquake, Mr. Meyer used the Osterberg-Cell in a novel manner to accelerate repair of the Los Angeles Coliseum. Working on both domestic and international projects, Mr. Meyer’s broad project experience includes geotechnical consulting for the Confederate Bridge connecting New Brunswick to Prince Edward Island over the ice filled Northumberland Straits; the 55 km elevated Bang Na Expressway Project in Bangkok, Thailand; the 3,000 acre C-44 Reservoir and Pump Station in South Florida; the Vancouver Skytrain Millennium Line; the Sheikh Jaber Al Ahmed Al Sabah Causeway in Kuwait; and the Puente de la Unidad cable-stayed bridge over the Santa Catarina River in Monterey, Mexico. He also has considerable knowledge and experience in the areas of seismic engineering and earthen levee and dam engineering.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

6 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Dr. John Turner, Ph.D., P.E., P.G., D.GE has been a practitioner, researcher, and educator in the field of geotechnical engineering for over 44 years. He has B.S. degrees in geology and civil engineering, an M.S. degree in structural engineering, and received his Ph.D. in geotechnical engineering from Cornell University. Dr. Turner is Emeritus Professor of Civil Engineering at the University of Wyoming where he served on the faculty from 1986 until joining DBA full time in 2011. During his academic career, he was engaged in research and consulting on drilled shaft foundations, anchored retaining walls, and landslide stabilization, much of which has been published in 100+ technical papers and reports. Since joining DBA Dr. Turner has been engaged as a design engineer and consultant on major projects including foundations for the Fore River Bridge (MA), Goethals Bridge (NY-NJ), the TH-53 Bridge (MN), and others. He is the co-author (with Dr. Brown) of Drilled Shafts: Construction Procedures and LRFD Design Methods (2019) and an instructor for the NHI drilled shaft course. Dr. Turner is the author of NCHRP Synthesis 360, Rock-Socketed Shafts for Highway Structure Foundations. He is a past chairman of the Geo-Institute Committee on Deep Foundations and is a recipient of the Outstanding Service Award (1992) and the President’s Award (2000) from the ADSC: International Association of Foundation Drilling. Principal Engineer

Dr. Steve Dapp, Ph.D., P.E., D.GE has over 25 years of experience in the design, construction, and testing of deep foundations. His engineering education includes degrees from Utah State University and University of South Florida (PhD, 2001), where his dissertation research was focused on the construction and behavior of base grouted drilled shafts, and his thesis research was focused on lateral loading of piles. He has experience in deep foundation construction as a project engineer/manager for Coastal Caisson Corp. (Bauer Group). His expertise in testing of deep foundations has been developed through his work experience with Loadtest, Inc. (bi-directional load cell testing) and with Applied Foundation Testing (Statnamic testing). Major projects with DBA involving design and construction of base grouted shafts include the Goethals Bridge replacement in New York City, New York, John James Audubon Bridge over the Mississippi river near Baton Rouge, Louisiana, the I-15 Beck Street Bridge in Salt Lake City, Utah, the expansion of the Huey P. Long Bridge over the Mississippi River in New Orleans, Louisiana, and the Honolulu High-Capacity Transit Corridor Project in West Oahu, Hawaii. Many other bridge and industrial deep foundation projects with DBA include the evaluation of the drilled shaft capacities and remediation associated with the DAN Reversible Elevated Lanes at the Le Roy Selmon Cross-Town Expressway in BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

7 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Tampa, Florida, an auger cast pile-raft foundation design in Sulphur Louisiana, and research into p-y curves for cemented soils. He was a co-author of the FHWA Geotechnical Engineering Circular 8, Design and Construction of Continuous Flight Auger Pile (2007), and a contributor to Drilled Shafts: Construction Procedures and LRFD Design Methods (2019). Dr. Dapp is a licensed professional engineer in Florida and Louisiana. Senior Engineers

Dr. Andrew Boeckmann, Ph.D, P.E. is a senior engineer at Dan Brown and Associates with over 13 years of experience. Prior to joining DBA, Dr. Boeckmann was a research engineer at the University of Missouri, where he performed field and applied research on topics including foundation reuse, post-grouted drilled shafts, reliability of geotechnical designs, and geotechnical asset management. Dr. Boeckmann is the lead author of two NCHRP Synthesis reports, including Current Practices and Guidelines for the Reuse of Bridge Foundations. Prior to working at MU, Dr. Boeckmann was a consulting geotechnical engineer for URS Corp. in St. Louis, Missouri, where he performed design and analysis for large projects, including the I-64 rebuild in St. Louis and post-Hurricane Katrina levee design in New Orleans, Louisiana. Dr. Boeckmann is an active member of the Deep Foundations Institute, including serving as the vice-chair of the Subsurface Characterization Committee, and a registered professional engineer in Missouri.

Mr. David Graham, MSCE, P.E. holds a bachelor's and a master’s degree in civil engineering from Auburn University. His thesis research focused on a novel method of soil liquefaction hazard mitigation. Mr. Graham has over 15 years of experience as a geotechnical and foundation engineering consultant. He is a licensed engineer in three states. He has consulted on many major bridge projects throughout the United States, including several Mississippi River crossings and the St. Croix Crossing between Minnesota and Wisconsin. He was also on the Owner’s design review team for the Gordie Howe International Bridge between Detroit, Michigan, and Windsor, Ontario, which will be the longest cable stayed bridge in North America upon completion. Mr. Graham is an active member of the Deep Foundations Institute (DFI) and its testing and evaluation technical committee. He is the lead or contributing author of nine pier reviewed conference papers and journal articles.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING 8 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Mr. Mark Madgett, MSCE, P.E. received a BS and MS degree in Civil Engineering at the University of Tennessee. His thesis research focused on improving pavement design methods for TDOT. He has worked in both consulting and construction for the last 26 years, focusing primarily on deep foundations in the Southeastern US. As a consultant, Mr. Madgett gained extensive field experience with deep foundation construction techniques and the impacts on design. In 2006, he began working for Seaboard Foundations, opening a green field office in Tri-Cities, Tennessee, as the district manager. In his role as design engineer for Seaboard Foundations, Mr. Madgett has implemented design-build techniques in many markets (energy, institutional, commercial, transportation, and healthcare) that vastly improved the constructability and reduced the costs of deep foundation systems.

Mr. Robert Saunders, MSCE, P.E. has a wide range of experience in geotechnical engineering and design of geotechnical structures. His experience includes over 17 years in consulting practice with S&ME, GEOServices, and DBA. Mr. Saunders received B.S. and M.S. degrees in Civil Engineering from the University of Tennessee. His consulting experience includes geotechnical investigations, construction in karst, and slope remediation. He has a broad design background specializing in analysis and design of earth retention systems and deep foundations. His experience with earth retention systems includes soldier pile walls, anchored systems, soil nail walls, and mechanically stabilized earth walls. His experience with deep foundations includes micro piles, drilled shafts, cast-in-place piles, and design of deep foundation in karst geology. He is a member of the Deep Foundations Institute (DFI) Micro pile Committee and is a licensed Professional Engineer in Tennessee, Indiana, Florida, New York, and Washington D.C.

Mr. Sam Sternberg III, MSCE, P.E., D.GE has over 18 years of geotechnical engineering experience. He received a B.S. and M.S. degree in Civil Engineering from the University of Kentucky and University of South Alabama, M.Div. degree from New Orleans Baptist Theological Seminary. He has worked in consulting on numerous private and public projects with the primary focus on department of transportation projects around the southeastern US. He has a broad design background including geotechnical site characterization, bridge foundation designs (shallow and deep), soft soil remediation, retaining walls (including cantilever, and mechanically stabilized earth walls), bulkheads and relieving platforms. Mr. Sternberg has expertise in planning, engineering, and managing field explorations for transportation projects, including in-situ testing, field instrumentation, laboratory testing, and foundation load testing. Mr. Sternberg is licensed in eight states. DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

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Dr. Benjamin Turner, Ph.D, P.E., G.E. is a geotechnical engineer specializing in seismic design aspects of geo-structural systems including foundations, excavations, and slopes, as well as advanced modeling. He holds Bachelor’s and Master’s degrees in civil engineering from California Polytechnic State University, San Luis Obispo, where he also serves as an adjunct lecturer for the Civil Engineering Graduate program, and a Ph.D. in geotechnical earthquake engineering with a minor in seismic structural reinforced concrete design from the University of California, Los Angeles. He continues to remain actively involved in research projects related to deep foundations and earthquake engineering, and serves on the Seismic and Lateral Loads and Drilled Shafts Committees of the Deep Foundations Institute. Dr. Turner’s previous research experience and publications cover the topics of seismic deep foundation design including the effects of liquefaction and lateral spreading, kinematic soil- structure interaction and foundation input motions for structural design, repair of defective reinforced concrete foundations, and landslide stabilization. His consulting experience includes a wide variety of bridge, building, retaining system, and slope designs throughout North America. Prior to joining DBA he worked for the Los Angeles office of Shannon and Wilson.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

10 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Selected Major Bridge Projects 3rd Avenue Mississippi River Bridge, Minneapolis, MN. The historic 3rd Avenue bridge spanning the Mississippi River in downtown Minneapolis, which is listed on the National Register of Historic Places, is being rehabilitated. As part of the structural rehabilitation, DBA was retained to provide foundation engineering expertise to HNTB and MnDOT. Among other items, our services include evaluation of the existing 100-yr old bridge foundations as well analysis of the existing retaining walls surrounding the bridge approaches.

Biloxi Bay (U.S. 90) Bridge Replacement, Biloxi, MS. DBA was consultant on the foundation design and construction on the new bridge replacement for the hurricane damaged U.S. 90 bridge across the bay between Biloxi and Ocean Springs, MS. This bridge is founded on prestressed concrete piles.

Christopher S. Bond Bridge, Kansas City, MO. Lead geotechnical designer for cable-stayed Missouri River crossing. Main pylon pier supported on drilled shaft foundations socketed into shale rock. Approach spans supported on drilled shafts seated into rock. Goethals Replacement Bridge, Elizabeth, NJ–Staten Island, NY. DBA was the lead geotechnical designer for a cable-stayed crossing over the Arthur Kill and NJ Turnpike. All pylon towers and piers are supported on rock-socketed drilled shafts. The project included full-scale drilled shaft axial and lateral load tests. Hastings Bridge Hastings Mississippi River Bridge, Hastings, MN. Lead geotechnical engineer and foundation designer for a new arch bridge founded on 42-inch diameter driven steel pipe piles and drilled shafts. The project also included a pile-supported approach embankment on deep compressible soils and full-scale axial and lateral load tests on large diameter pipe piles. Highway 53 Bridge Rouchleau Mine Pit Bridge, Virginia, MN. Lead geotechnical engineer and foundation designer for a 200-ft tall bridge over a currently inactive iron ore mine pit. The three span girder structure is Minnesota’s tallest bridge. Piers are founded on large diameter micropiles bearing in extremely hard iron ore bedrock. In addition to foundation design, DBA conducted a thorough analysis of existing a proposed rock and soil slopes. The project included a pre-design phase load test program. Huey P. Long Bridge, New Orleans, LA. This existing bridge underwent a major retrofit to widen the deck. DBA assisted Kiewit Engineering during a the refit and expansion including one major new foundation within the river. DBA assisted with the design of the work platform, and the installation plan, drilled shaft base grouting, and load testing of the new drilled shaft foundations for Pier IV-A.

HUEY P. LONG BRIDGE - New Orleans, Louisiana DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

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I-30 Arkansas River Bridge, Little Rock, AR. ArDOT is improving a portion of I-30 between the I-530/I-440 interchange the I-40 interchange in North Little Rock including the Arkansas River Bridge. The proposed bridges will be a steel plate girder bridge with four river spans. DBA is the lead geotechnical designer for the river bridge foundations which will be founded on 10-ft diameter drilled shafts socketed into weak shale bedrock. Unique challenges also considered seismic due to the close proximity of the project to the New Madrid fault. The foundations were designed to resist lateral spreading due to seismic induced soil liquefaction. I-90 Bridge Replacement I-90 Replacement Bridges over the Blackfoot River, Bonner, MT. The project included removal of the existing twin bridge structures spanning the Blackfoot River near its confluence with the Clark Fork River, regrading of the abutment slopes, and installation of new bridges on the current alignment. Several slope stability hazards ranging from historic static instability to potential seismic instability exist. DBA was the slope stability expert for this difficult bridge replacement project. . DBA worked with the successful design/build team to develop slope stability mitigation methods specifically suited for the project, including installation of 24-in diameter, open-ended driven pipe piles to address and arrest several potential failure mechanisms John James Audubon Bridge, New Roads, LA. The longest cable-stayed span in North America at the time of completion, DBA was the geotechnical engineer and foundation designer for the main span piers and the high level approach piers and consultant with PSI on the low level structures. The major bridge components are supported on 8-foot diameter base-grouted drilled shaft foundations. Approach foundations include driven 24-inch square prestressed piles. 60-inch diameter open-ended steel pipe piles were used for temporary piers. Sellwood Willamette River Bridge, Portland, OR. Lead Geotechnical Designer for drilled shaft foundations supporting a concrete arch bridge spanning the Willamette River. Temporary, full-length segmental casing installed with an oscillator were used to construct the drilled shafts socketed into the cemented Troutdale Formation or hard basalt bedrock. St. Croix Crossing Bridge Stan Musial Veterans Memorial Bridge, St. Louis, MO. Foundation design via Alternate Technical Concept (ATC) and load testing for a new cable-stayed bridge founded on large diameter drilled shafts socketed into limestone bedrock. A full scale axial load test of an 11-foot diameter rock socket was performed, yielding a world record setting 36,000-ton bi-directional test.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

12 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL St. Croix Crossing Bridge, Stillwater, MN. Geotechnical engineer and load testing expert for the extradoses bridge over the St. Croix River. Tower piers are founded on 9-foot diameter drilled shafts socketed into sandstone bedrock. US231 Emergency Slide Repair (Bridge Design and Construction, Morgan Co., AL. The large landslide occurred on SR-53 (US-231) in Morgan County south of Huntsville. The slide completely severed the 4-lane divided highway, a major commuting route between Huntsville and several communities south of the city. Two bridges were selected as the solution to the landslide with each bridge pier supported on a pair of 9.5ft diameter, permanently cased (7/8 inch wall, 60ksi) drilled shafts with 9ft diameter, 14ft long rock sockets drilled into limestone and shale bedrock. The pair of shafts for each pier is connected by a reinforced concrete grade beam 10ft wide by 7ft high by 46ft long. US52 Mississippi River Bridge, Savanna, IL. The 1932 truss bridge over the Mississippi River at Savanna, IL was replaced with a new 2,462 bridge that included a 546-ft-span tied-arch for the main span. The river spans are supported on drilled shafts socketed into limestone bedrock. The approach spans across the Iowa floodplain are supported on closed-ended driven pipe piles. DBA served as a geotechnical consultant on the project. US63 Mississippi River Bridge, Red Wing, MN . The existing, continuous over-deck streel truss bridge spanning the Mississippi River at Red Wing, MN was replaced with a steel box girder structure with a 432-ft main span. DBA was the Foundation Engineer of Record for the main span of the structure, which is supported on large-diameter drilled shafts socketed into soft sandstone bedrock. The approach spans across the Wisconsin floodplain are supported on H-piles driven to refusal on sandstone bedrock . Red Wing Bridge (conceptual rendering) US181 Harbor Bridge, Corpus Christi, TX. TXDOT contracted to replace the existing Harbor Bridge and reconstruct portions of US 181, I-27, and the Crosstown Expressway. DBA provided consultation on key aspects of the foundations and ground improvement along with observing the full-scale load tests on the drilled shafts.

US 181 Harbor Bridge Nashville Airport—Soldier Pile Wall

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

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Hurricane Deck Bridge

Selected Other Projects Alabama Judicial Center (State Supreme Court Building), Montgomery, AL. Consultant on the design and construction of deep foundations Bollinger Shipyard, Lake Charles, LA. Geotechnical designer for dock and associated structures. Bridge of Lyons, St. Augustine, FL. Served as consultant to Skanska (contractor) for repair/redesign of drilled shaft foundations for rehabilitation of this historic bridge. Cumberland River Pedestrian Bridge, Nashville, TN. DBA designed a micropile foundation as a value-engineered replacement for drilled shafts on a steep slope along the river to support this suspension bridge structure. Dulles Metrorail Project, VA. Foundation consultant for elevated guideway portion of the extension of the metro transit system near Tyson’s Corner, VA. Foothills Parkway Bridge, TN. Foundation designer for a micropile-supported bridge in remote mountainous terrain, constructed to minimize environmental impact for National Park Service. Gilmerton Bridge, Chesapeake, VA. Prepared a foundation design as a Value-Engineered alternate, including a full scale load testing program, for 12ft diameter drilled shafts for a new lift bridge over the Elizabeth River. GIWW West Closure Project, Belle Chasse, LA. Consultant to Kiewit construction team and the U.S. Army Corps of Engineers on the construction of the flood gates at the Harvey Canal as part of the flood control structures in Louisiana after Hurricane Katrina. Hurricane Deck Bridge, Lake of the Ozarks, MO. Foundation design and evaluation of the re-use of existing caissons for a new long-span bridge. I-10 Escambia Bay Bridge Replacement, Pensacola, FL. consultant on replacement of I-10 bridge destroyed by hurricane Ivan, recently completed with driven pile foundations. I-15 Beck St. Bridge, Salt Lake City, UT. Lead geotechnical designer for bridge replacement for I-15 across the Union Pacific Railroad and access roads. Large diameter drilled shaft foundations and driven piles were installed in liquefaction-prone area. I-35W Bridge Replacement, Minneapolis, MN. Consultant to MNDOT on the replacement of the collapsed structure over the Mississippi River. The new structure included drilled shafts socketed into limestone.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

14 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL

Lafayette Bridge, St. Paul, MN. Foundation designer for a new Mississippi River Bridge crossing, founded on 42-inch diameter open-ended driven steel pipe piles. L’Auberge Casino Resort, Lake Charles, LA. Geotechnical designer for foundations of high rise hotel, dock, and associated structures. Light Rail Elevated Guideway Structure, Honolulu, HI. Foundation consultant for 6 mile long elevated structure in a congested urban environment, OMHS Hospital Facility supported on drilled shaft foundations. LPV-145 Project, Chalmette, LA. Consultant to Kiewit construction team and the U.S. Army Corps of Engineers on the construction of flood control structures in Louisiana after Hurricane Katrina. NASA Advanced Solid Rocket Motor fabrication facility, Iuka, MS. Consultant to Rust International Corp. on the design of foundations for blast effects. NASA Rocket Motor test facility, Bay St. Louis, MS. Consultant to Rust International Corp. on the design of foundations for lateral vibrations. OMHS Replacement Hospital Facility, Owensboro, KY. Designer for a ground improvement system using drilled displacement columns for liquefaction mitigation and foundation soil improvement. Populus Transmission Line, UT. Consultant to Black & Veatch / Kiewit Joint Venture on the design and construction of transmission line structures for a high voltage line between Salt Lake City and southern Idaho. Port of Lake Charles, LA. Geotechnical designer of sheet pile and pile supported dock structures and associated structures Slope Stabilization on the Missouri River for UPRR, Gasconade, MO. Design of a pile stabilization for slope stability along a rail line near the Missouri River.

FOOTHILLS PARKWAY BRIDGE – Tennessee Wolf Creek Dam DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

15 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL SR 53 Westbound at Chattahoochee River Bridge Replacement, Gainesville, GA. Independend review of the bridge foundation design (large diameter drilled shafts and driven piles)in 90-100ft of water. Sugar Cane Bay Casino Resort, Lake Charles, LA. Geotechnical designer for foundations of high rise hotel, dock, and associated structures Wastewater Treatment Facility, Lake Charles, LA. Geotechnical design of deep foundations for tanks and treatment facilities. Wolf Creek Dam, Jamestown, KY. Consultant to Treviicos / Soletanch Joint Venture on the construction of a secant pile cutoff wall for a U.S. Army Corps of Engineers dam onthe Cumberland River. Load Testing Program Consultant for: • Board of Public Utilities U.S. Army Corps of Engineers Flood Wall, Kansas City, KS • Cape Fear Bridge near Wilmington, NC • CSX Railroad over Lorton Road, VA • I-10 Mobile River Bridge, AL • I-95 Interchange, VA • Pascagoula River Bridge, Pascagoula, MS

• Riverfront Retaining Walls, Puerto Rico for the U.S. Army Corps of Engineers • SC Hwy 41 Bridge over the Black River, SC • SR2 Choctawhatchee River Bridge, FL • SR217 /US 98 Bridges, Mobile, AL • US Hwy 15/401 Bridge over Great Pee Dee River, SC I-15 BECK STREET BRIDGE - Salt Lake City, Utah • US Hwy 23 Bridge over the Ohio River Manuals and Major Reports Authored by DBA Staff

FHWA/NHI Manuals

Drilled Shafts: Construction Procedures and LRFD Design Methods (FHWA-NHI-10-016, Geotechnical Engineering Circular No. 10, NHI Course No. 132014). Brown, D.A., Turner, J.P., and Castelli, R. J. (2019).

Geotechnical Site Characterization (FHWA-NHI-16-072, Geotechnical Engineering Circular No. 5, NHI Course No. 132031). Loehr, J.E., Lutenegger, A., Rosenblad, B., and Boeckmann, A. 2017.

Design and Construction of Continuous Flight Auger Piles (FHWA-HIF-07-03, Geotechnical Engineering Circular No. 8). Brown, D.A., Dapp, S.D., Thompson, W.R., and Lazarte, C.A. (2007). DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

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NCHRP Reports

NCHRP Synthesis 360, Rock-Socketed Shafts for Highway Structure Foundations, Transportation Research Board, National Academies, Washington, D.C., 136p, Turner, J. P. (2006)

NCHRP Synthesis 418, Developing Production Pile Driving Criteria from Test Pile Data, Transportation Research Board, National Academies, Washington, D.C., 505p, Brown D. A. and Thompson, W.R. (2011)

NCHRP Report 461, Static and Dynamic Lateral Loading of Pile Groups., Transportation Research Board, National Academies, Washington, D.C., 50p, Brown D.A., O’Neill, M.W., Hoit, M., McVay, M., Naggar, H.E. and Chakraborty, S. (2001)

NCHRP Synthesis 478, Design and Load Testing of Large Diameter Open-Ended Driven Piles., Transportation Research Board, National Academies, Washington, D.C., 128p, Brown D. A. and Thompson, W.R. (2015)

NCHRP Report 697, Design Guidelines for Increasing Lateral Resistance of Bridge Pile Foundations., Transportation Research Board, National Academies, Washington, D.C., 98p, Rollins, K.M. and Brown D.A. (2011)

Other Recent Major Reports

Turner, B., Brandenberg, S.J. and Stewart, J.P. (2014). “Evaluation of Collapse and Non-Collapse of Parallel Bridges Affected by Liquefaction and Lateral Spreading”, PEER Report 2014/10, Pacific Earthquake Engineering Research Center, University of California, Berkley, August, 2014, 94pp.

Siegel, T.C. (2013). “Liquefaction Mitigation Synthesis Report prepared for the Ground Improvement Committee of the DFI”, DFI Journal Volume 7, Number 1, August 2013, Deep Foundations Institute, pp 13-31.

Thompson, W.R., Brown, D.A., and Hudson, A.B. (2012). “Load Testing of Drilled Shaft Foundations in Piedmont Rock, Lawrenceville, GA, Report for ADSC Southeast Chapter, January, 2012.

Brown, D.A. (2009). “Load Testing of Drilled Shaft Foundations in Limestone, Nashville, TN”, Report for ADSC Southeast Chapter, Feb. 2009.

Loehr, E.J. and Brown, D.A. (2008). ” A Method for Predicting Mobilization Resistance for Micropiles Used in Slope Stabilization Applications”, A Report Prepared for the Joint ADSC/DFI Micropile Committee.

Pierson, M., Parsons, R.L., Han, J., Brown, D.A. and Thompson, W.R. (2008). “Capacity of Laterally Loaded Shafts Constructed Behind the Face of a Mechanically Stabilized Earth Block Wall”, Report for the Kansas Department of Transportation Recent Technical Publications by DBA Staff Boeckmann, A.Z. and Loehr, J.E. (2019). “Evaluation of Thermal Integrity Profiling and Crosshole Sonic Logging for Drilled Shafts with Concrete Defects,” Transportation Research Record, 2673(8), pp. 86-98.

Boeckmann, A.Z. (2019). “Estimating Capacity and Reliability of Existing Foundations for Evaluation of Reuse,” Journal of the Deep Foundations Institute, Deep Foundations Institute, New York, NY, Vol. 13, No. 1, pp. 11-24.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

17 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL

Ding, D. and J.E. Loehr (2019). “Variability and Bias in Undrained Shear Strength Established from Different Sampling and Testing Methods,” Journal of Geotechnical and Geoenvironmental Engineering, Vol 145, No. 10, pp.04019082. DOI: 10.1061/(ASCE)GT.1943-5606.0002121

Graham, D.S., Hasbrouck, G.T., Axtell, P.J., and Turner, J.P. (2017). “Reducing Longitudinal Demands on Tall Bridge Piers with an Anchored Abutment”, Proceedings of the 34th International Bridge Conference, 2017, National Harbor, MD, USA, pp 668-672.

Graham, D.S., Turner, J.P. and Axtell, P.J. (2016). "Rockfall Hazard Mitigation at the TH-53 Bridge, Virginia, Minnesota" Proceedings: 67th Highway Geology Symposium, pp. 1-20.

Turner, B., Brandenberg, S., and Stewart, J. (2016). “Case Study of Parallel Bridges Affected by Liquefaction and Lateral Spreading.” J. Geotech. Geoenviron. Eng., 10.1061.

Siegel, T. C. and Lucarelli A. (2016). "Theory and modelling of negative skin friction on a pile in soil" DFI Journal - The Journal of the Deep Foundations Institute, Vol. 10 (3), pp. 135-142.

Axtell, P.J., Muchard, M.K., and Lamb, R.A. (2015) “A Summary of Load Test Results on Large Diameter Open- Ended Pipe Piles in Minnesota”, Proceedings: Deep Foundations Institute 40th Annual Conference, pp. 169-178.

Axtell, P.J. and Siegel, T.C. (2015). “Sustainability and Reuse of Foundations for the Hurricane Deck Bridge”, Deep Foundations, Jan/Feb 2015, Deep Foundations Institute, Hawthorne, NJ, pp 77-80.

Dasenbrock, D.D., Axtell, P.J., and Budge, A.S., (2015). “The Unexpected Consequences of a Small Side-Hill Fill.” Proceedings of The 63rd Annual University of Minnesota Geotechnical Engineering Conference, St. Paul, MN, USA.

Graham, D.S., Axtell, P.J., Muchard, M.K., and Bailey, J.D. (2015) “Effect of Axial Compression on Lateral Pile Response: Laterally Loaded Test Pile Comparison”, Proceedings: Deep Foundations Institute 40th Annual Conference, pp. 15-24.

Luna, R., Dixon, D.T., Kershaw, K.A., and Siegel, T.C. (2015). “Monitoring Micropile Foundations of Bridge during Construction .” IFCEE 2015. March 2015, pp 878-889.

Siegel, T.C. and Bivens, R.M. (2015). “Numerical Modeling in Micropile Design for a Pusher Furnace.” IFCEE 2015. March 2015, pp 890-898.

Siegel, T.C. and Faust, P. (2015). “Overburden Effect on the Axial Resistance of Instrumented CFA Piles.” IFCEE 2015. March 2015, pp 703-711.

Turner, B. and Brandenberg, S. (2015) “Pile Pinning and Interaction of Adjacent Foundations During Lateral Spreading”, DFI Journal, Volume 9, Issue 2.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

18 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Axtell, P.J. and Siegel, T.C. (2014). “Sustainability and Consideration for the Re-use of Foundations for the Hurricane Deck Bridge”, Proceedings of the 39th Annual Conference on Deep Foundations, 2014, Atlanta, GA, USA, pp 163-170.

Boeckmann, A.Z., Myers, S.G., Uong, M., and Loehr, J.E. (2014). “Comparison of Drilled Shaft Structural Response from Strain Gage and Shapeaccelarray (SAA) Data”, Proceedings of the 39th Annual Conference on Deep Foundations, 2014, Atlanta, GA, USA, pp 141-150.

Siegel, T.C., Lamb, R., Dasenbrock, D., and Axtell, P.J. (2014). “Neutral Plane Method for Drag Force of Deep Foundations and the AASHTO LRFD Bridge Design Specifications”, Proceedings of The 62nd University of Minnesota Annual Geotechnical Engineering Conference, St. Paul, MN, USA.

Turner, B.J. (2014). Evaluation of Influence on Lateral Spreading Displacement Demand for Adjacent Bridges”, Proceedings of the 39th Annual Conference on Deep Foundations, 2014, Atlanta, GA, USA.

Turner, B.J. and Turner, J.P. (2014). “Friction Loss in Tieback Anchors Used for Landslide Stabilization”, Proceedings of the 39th Annual Conference on Deep Foundations, 2014, Atlanta, GA, USA, pp 185-192.

Axtell, P.J., Brown, D.A., Lamb, R.A., Graham, D.S., and Ryan, W.G. (2013). “St. Croix Bridge, Minnesota: The Influence of Construction on the Axial Resistance of Drilled Shaft Foundations in Weak Sandstone”, Proceedings of the 38th Annual Conference on Deep Foundations, 2013, Phoenix, AZ, USA, pp. 125-133.

Graham, D.S., Dapp, S.D., Brown, D.A., and McGillivray, R.T. (2013). “Selmon Expressway: Case History of Drilled Shaft Design for Extreme Variability”, Proceedings of the 38th Annual Conference on Deep Foundations, 2013, Phoenix, AZ, USA, pp. 317-328.

Saye, S.R., Brown, D.A., and Lutenegger, A.J. (2013). “Assessing Adhesion of Driven Pipe Piles in Clay Using Adaptation of Stress History and Normalized Soil Engineering Parameter Concept”, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, July 2013, pp. 1062-1074.

Siegel, T.C., Drake, D.F., and Drumm, E.C. (2013). “Application of Stability Charts and Reliability Concepts for Simplified Analysis of a Void in Soil Overlying Karst Bedrock”, Proceedings of the 13th Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, 2013, Carlesbad, NM, USA, pp. 37-44.

Siegel, T.C., Lamb, R., Dasenbrock, D., and Axtell, P.J. (2013). “Alternative Design Approch for Drag Load and Downdrag of Deep Foundations within the LRFD Framework”, Proceedings of the 38th Annual Conference on Deep Foundations, 2013, Phoenix, AZ, USA, pp 23-39.

Turner, J.P., and Halvorson, M. (2013). “Design Method for Slide-Stabilizing Micropile Walls”, GeoCongress 2013 Stability and Performance of Slopes and Embankments III, Geotechnical Special Publication No. 231, ASCE.

Brown, D.A. (2012). “Factors Affecting the Selection and Use of Drilled Shafts for Transportation Infrastructure Projects”, ADSC EXPO 2012 Geo-Construction Conference Proceedings, March 14-17, 2012, San Antonio, TX, pp. 25-35.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

19 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL Brown, D.A. and Thompson, W.R. (2012) “ADSC Research Supports Improved Design of Drilled Shaft Foundations in Atlanta Area Piedmont Rock”, Foundation Drilling, Vol. 33, No. 2, February 2012, pp. 27-39.

Siegel, T.C. (2012). “Testing of Augered Cast-in-Place Piles installed with Varying Auger Rotations”, Full-Scale Testing and Foundation Design, Honoring Bengt H. Fellenius, Geotechnical Special Publication No. 227, Edited by M.H. Hussein, K. R. Massarsch, G.E. Likins, and R.D. Holtz, ASCE, pp. 333-348.

Strark, T.D., Beaty, M.H., Byrne, P.M., Gonzalo, C., Walberg, F.C., Perlea, V.G., Axtell, P.J., Dillon, J.C., Empson, W.B., and Mathews, D.L. (2012). “Seismic Deformation Analysis of Tuttle Creek Dam”, Canadian Geotechnical Journal, Vol. 48, No. 3, March 2012, pp. 323- 343.

Thompson, W.R. (2012). “ADSC Research Project Update: Rock Sockets in the Southeastern U.S”, ADSC EXPO 2012 Geo-Construction Conference Proceedings, March 14-17, 2012, San Antonio, TX, pp. 103-117.

Turner, J.P., Duffy, J.D., Buell, R. and Zheng, X (2012). “Foundations for the Bridge at Pitkins Curve”, GeoCongress 2012 State of the Art and Practice in Geotechnical Engineering, Geotechnical Special Publication No. 225, ASCE, pp. 414-423.

Axtell, P.J. and Brown, D.A. (2011). “Case History – Foundations for the New Mississippi River Bridge – St.Louis”, DFI Journal Volume 5, Number 2, December 2011, Deep Foundations Institute, pp. 3-15.

Brown, D.A. (2011). “Constructability Considerations When Designing Drilled Shaft Foundations for Bridges”, Geo -Strata, May/June 2011, pp. 48-54.

Brown, D.A., Axtell, P.J., and Kelley, J. (2011). “The Alternate Technical Concept Process for the Foundations at the New Mississippi River Bridge, St. Louis”, Proceedings of the 36th Annual Conference on Deep Foundations, 2011, Boston, MA, USA, pp. 171-177.

Axtell, P.J., Stark, T.D., and Dillon, J.C. (2010). “Peak and Post-Peak Shear Strength of Cement-Bentonite”, DFI Journal Volume 4, No. 1, August 2010, Deep Foundations Institute, pp59-65.

Brown, D.A. and Axtell, P.J. (2010). “Design and Construction Challenges at the kcICON Bridge”, Deep Foundations Magazine, Spring 2010.

Dapp, S.D. and Brown, D.A. (2010). “Evaluation of Base Grouted Drilled Shafts at the Audubon Bridge”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp. 1553-1562.

Loehr, J.E. and Brown, D.A. (2010). “Design of Micropiles for Slope Stabilization”, Foundation Drilling, Vol. 31, No. 6 August 2010.

Rollins, K.M., Herbst, M., Adsero, M. and Brown, D.A. (2010) “Jet Grouting and Soil Mixing for Increased Lateral Pile Group Resistance”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp. 1563-1572.

Siegel, T.C. (2010). “Load Testing and Interpretation of Instrumented Augered Cast-in-Place Piles”, DFI Journal Volume 4, No. 2, December 2010, Deep Foundations Institute, pp. 69-71.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING

20 IMAGINATIVE ▪ RESPONSIBLE ▪ ECONOMICAL

Siegel, T.C. and NeSmith, W.M. (2010). “Large-Scale Plate Load Testing of Ground Improvement Using Displacement Grout Columns”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp. 2398-2405.

Axtell, P.J., Thompson, W.R., and Brown, D.A. (2009). “Drilled Shaft Foundations for the kcICON Missouri River Bridge”, Deep Foundations Institute 34th Annual Conference on Deep Foundations, Conference Proceedings 2009, October 21-23, 2009, Kansas City, Missouri, pp. 3-12.

Brown, D.A. (2009). “Management of Risk in Deep Foundations with Design-Build”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Deep Foundations, Geotechnical Special Publication No. 185, ASCE, pp. 1-11.

Brown, D.A. and Thompson, W.R. (2009). “Drilled Shaft Performance in Cemented Calcareous Formations in the Southeast United States”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Deep Foundations, Geotechnical Special Publication No. 185, ASCE, pp. 119-126.

Brown, D.A. and Thompson, W.R. (2009). “Performance of Drilled Shaft Foundations in Limestone, Nashville, Tennessee” Foundation Drilling, Vol. 30, No.4 May 2009.

Loehr, J.E and Huaco, D.R. (2009). “Probabilistic Calibration of Resistance Factors for Slope Stability”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in In-Situ Testing, Analysis, and Reliability of Foundations, Geotechnical Special Publication No. 186, ASCE, pp. 297-304.

Parson, R.L., Johnson, R.M., Brown, D.A., Dapp, S.D., and Brennan, J.J. (2009). “Characterization of Loess for Deep Foundations”, DFI Journal Volume 3, No. 2, November 2009, Deep Foundations Institute, pp14-24.

DAN BROWN AND ASSOCIATES SPECIALISTS IN GEOTECHNICAL & FOUNDATION ENGINEERING