DOCSLIB.ORG

Dissertation Modeling Pool Sediment Dynamics in A

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Dissertation Modeling Pool Sediment Dynamics in A DISSERTATION MODELING POOL SEDIMENT DYNAMICS IN A MOUNTAIN RIVER Submitted by Sara L. Rathburn Department of Earth Resources In partial fulfillment of the requirements for the Degree of Doctor of Philosophy Colorado State University Fort Collins, Colorado Fall 2001 COLORADO STATE UNIVERSITY August 31, 2001 WE HEREBY RECOMMEND THAT THE DISSERTATION PREPARED UNDER OUR SUPERVISION BY SARA L. RATHBURN ENTITLED MODELING POOL SEDIMENT DYNAMICS IN AMOUNTAIN RIVER BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY. Committee on Graduate Work Adviser rJ:£L-If- Department Head £ 11 COLORADO STATE UNIVERSITY August 31, 2001 WE HEREBY RECOMMEND THAT THE DISSERTATION PREPARED UNDER OUR SUPERVISION BY SARA L. RATHBURN ENTITLED MODELING POOL SEDIMENT DYNAMICS IN AMOUNTAIN RIVER BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY. Department Head 11 ABSTRACT OF DISSERTATION MODELING POOL SEDIMENT DYNAMICS IN A MOUNTAIN RIVER An increasingly important source of sediment into river systems is sediment that accumulates within reservoirs and is subsequently released into the downstream ecosystem. In Colorado alone, five large-scale sediment releases from reservoirs within the last decade have resulted in a host of environmental hazards, particularly the loss of aquatic biota and their habitat. The most recent example occurred in September 1996 when approximately 7,000 m3 of clay- to gravel-sized sediment were released from Halligan Dam into the North Fork Cache la Poudre River in northern Colorado. The sediment caused extensive aggradation of the original cobble-boulder bed, primarily in pools, and complete fish mortality for 12 km downstream from the dam. Because of the thriving, pre-release wild trout fishery downstream from Halligan Reservoir, flushing of sediment from pools to recreate overwinter fish habitat was of prime concern. The purpose of this investigation was to evaluate the applicability of various hydraulic and sediment transport models as predictors of pool recovery along the steep- gradient, bedrock-controlled North Fork River. Two modeling scenarios representing a low and high flushing discharge were modeled using one- and semi-two dimensional sediment transport models, HEC-6 and GSTARS2.0, respectively. The models were calibrated against quantitative measurements of pool bed elevation obtained during field iii surveys. HEC-6 results indicate that long-tenn, robust simulations yield the closest agreement between predicted and measured pool bed elevation change. Greater than 50 percent of the actual scour and deposition within three pools was modeled using HEC-6. Modeling accuracy using GSTARS2.0 was considerably more variable, and no pool-wide trends were obtained. A two-dimensional, finite element hydraulic model, RMA2, improved delineation of flow hydraulics in areas of flow separation and recirculation within a compound pool. RMA2 results of depth-averaged velocity magnitude and vectors broadly agree with timed photographs of surface flow patterns, and correspond with velocity measurements for low-velocity areas such as eddy pools. Patterns of boundary shear stress and a particle stability index accurately predict gross areas of scour and deposition, but fail to represent the simultaneous aggradation and degradation measured in pools. Estimates of bedload transport capacity from the two-dimensional modeling results are one order of magnitude greater than measured transport rates, and indicate that supply-limited conditions existed along the North Fork following a clear-water flushing release. Further correlations between observed and modeled sedimentation patterns are hindered by the disparity in resolution between the field data and modeled results; field-based cross sectional information is quickly outstripped by the finite element model RMA2. Finally, a conceptual model of pool sediment dynamics was developed for water resource specialists as an alternative to the time-intensive effort and expertise required of the numerical modeling. Predictable sites of channel aggradation and degradation resulting from a sediment pulse are identified on a reach-scale hierarchy_ Processes of sediment delivery, storage, and transfer into and out of eddies that influence fish occur on iv the width scale, however. Sedimentation within laterally confined pools is dependent on pool geometry, distance downstream from the dam (a surrogate of sediment supply), and the duration and magnitude of flows following the release. At low flows, sediment deposition is restricted to small areas of recirculating flow. As discharge increases, migration of the separation point and development of a strong shear zone limits the transfer of sediment between the eddy and the main flow. The sediment release from Halligan induced persistent, long-term storage of fine sediment because of an elevated channel bed and loss of channel capacity_ Recognition of the hazards associated with a large influx of sediment into a riverine ecosystem is critical for a greater understanding of the effects of sediment releases, and future management of sediment within reservoirs. Sara L. Rathburn Department of Earth Resources Colorado State University Fort Collins, CO 80523 Fall 2001 v ACKNOWLEDGEMENTS Many people have contributed in a myriad of ways to the completion of this document. It was in no way singly undertaken, and I offer a modification to an existing saying; 'It takes a village to complete a Ph.D.' First, I want to thank my advisor Dr. Ellen Wohl for agreeing to take on a part-time, highly non-traditional student. These past four years have been stimulating, challenging, and exceedingly enjoyable. I have relished our hours in the field, in the office, and elsewhere, discussing my project, geomorphology in general, and mountain rivers in particular. Ellen's clarity and insight always kept me focused and ensured thoroughness and perseverance in spite of my struggles with the model-of-the-day. I look forward to more scientific interactions with her. Thank you to my other committee members Drs. Deborah Anthony, Pierre Julien, and Stanley Schumm. Deb offered substantive input and encouragement, provided key insight into sediment transport processes and evaluation of the modeling results, and allowed me to sit in on an excellent class on fluvial and eolian transport. Pierre taught two semesters of courses on erosion and sedimentation and river mechanics, and his courses, along with Deb's, were the best classes I took during my graduate tenure. I refer to those notes and the texts more than any other. Stan kindly offered to fill in as a third department committee member, as a favor, after I lost one committee member to a job change. Thank you to Dr. Robert Ward for substituting during my orals, and for his overall interest in my research. Dr. Brian Cluer provided encouragement and initial assistance during early phases of my research. Initial phases of this research were supported by funding from the Colorado Water Conservation Board, U.S. Bureau of Reclamation, and Trout Unlimited. Major support was provided by National Science Foundation Grant CMS-9727061 to Dr. Ellen Wohl. Additionally, I received a Career Development Grant from the American Association of University Women, the American Water Resources Association Rich Herbert Scholarship, a Rocky Mountain Association of Geologist Foundation Grant, and the Ned vi and Barbara Dils Scholarship. All of this monetary support was crucial to the completion of my degree. Heather Knight, John Stokes, and various interns working at The Nature Conservancy's Phantom Canyon Preserve have been enthusiastic and helpful, providing logistical support throughout the duration of this research. North Poudre Irrigation Co. provided access to Halligan Dam and to upstream reaches of the study site. I appreciate the opportunity to explore sediment dynamics in such a lovely, fascinating setting. Numerous graduate students assisted me throughout various phases of my research. I thank Dan Cenderelli, Janet Curran, Jasper Hardison, and Ron ZeIt, Doug Thompson, and John O'Brien for assisting in the data collection prior to my beginning school. Dan Cenderelli' s effort was critical to the overall high quality of data collected along the North Fork, and I appreciate discussions with him and field companionship. Greg Springer provided Adobe Illustrator guidance, and was open to an exchange of ideas about eddy system hydraulics. Greg Stewart offered important, patient insight into a fickle two-dimensional model, and served as a main-stay in my support system. I have missed our daily discussions tremendously. Additional individuals to whom I am grateful include Jason Alexander and Allison Thorton, summer assistants through the RED program sponsored by NSF. Karla Schmidt, work study, helped with a poster presentation. Francisco Simoes, U.S. Bureau of Reclamation, graciously reviewed my GSTARS2.0 data files, and provided insight into model particulars that would have been missed. Lyle Zevenbergen, Ayres Associates, kindly offered his time and expertise with RMA2 and SMS when I felt really stuck. To my parents, Buz and Katie Rathburn, I am tremendously grateful for their emotional support, help with childcare, and understanding the multifaceted roles in my life. Thank you to my mother, who in a mother-daughter phone conversation encouraged me to pursue a Ph.D. in the first place, and offered immense support in all ways. To my father, who worked on a doctorate for seven years while maintaining
Load more

Recommended publications
  • On Our Drive Back Through Utah from Rocky Mountain National Park, We Had a Couple of Hours to Stop at the Dinosaur National Monu
    DINOSAUR NATIONAL MONUMENT: QUARRY EXHIBIT HALL, SPLIT MOUNTAIN VIEWPOINT, AND SWELTER SHELTER ! PETROGLYPHS AND PICTOGRAPHS On our drive back through Utah from Rocky Mountain National Park, we had a couple of hours to stop at the Dinosaur National Monument after driving out of RMNP through the Trail Ridge Road. Best known for the huge wall of dinosaur fossils, protected by a large and enclosed building, which visitors can see by taking a shuttle bus from the main visitors center, this national monument also has a surprising collection of amazing rock formations. Unfortunately, we did not have time to see much of the monument, but there are many paved, dirt, and 4WD access roads to overlooks of the Green and Yampa Rivers, petroglyphs and pictographs, slot canyons, and historical cabins. After visiting the Quarry Exhibit Hall, we briefly checked out the Fossil Discovery Trail, then continued on to an overlook of Split Mountain and the Green River. We had considered continuing along this road to see more overlooks on the way to the Josie Morris Cabin, but we didn't have enough time, and therefore only were able to stop at the Swelter Shelter petroglyphs and !pictographs. The views from Trail Ridge Road on our drive out of Rocky Mountain National Park were a little different on such a clear day; this is Sundance Mountain pictured below: ! ! There was still quite a bit of snow on the peaks, making for good photography again: ! ! Looking over towards the Gorge Lakes (in the valley to the left, with Arrowhead Lake visibly iced over and Highest
    [Show full text]
  • Front Range Floods Teach Guide
    National Park Service Rocky Mountain U.S. Department of Interior Rocky Mountain National Park Front Range Floods Teacher Guide Table of Contents Rocky Mountain National Park.................................................................................................1 Teacher Guides..............................................................................................................................2 Rocky Mountain National Park Education Program Goals...................................................2 Schedule an Education Program with a Ranger.......................................................................2 Front Range Floods Introduction........................................................................................................................4 Precipitation Patterns Along The Front Range..............................................................5 Colorado Flood Events.....................................................................................................6 Flooding in Rocky Mountain National Park...............................................................12 History of Floodplain Management in the United States..........................................14 Front Range Floods Resources Glossary.............................................................................................................................20 References.........................................................................................................................22 Rocky Mountain National Park Rocky Mountain
    [Show full text]
  • 50 Years Celebrating Earth, Atmosphere, Astronomy, and Oceans: Stories of a Great Department
    University of Northern Colorado Scholarship & Creative Works @ Digital UNC Earth & Atmospheric Sciences Faculty Publications Earth & Atmospheric Sciences 2020 50 Years Celebrating Earth, Atmosphere, Astronomy, and Oceans: Stories of a Great Department William Henry Hoyt Follow this and additional works at: https://digscholarship.unco.edu/easfacpub 50 Years Celebrating Earth, Atmosphere, Astronomy, and Oceans: Stories of a great Department By William H. Hoyt, Ph. D. University of Northern Colorado Department of Earth Sciences (Earth & Atmospheric Sciences) 1970-2020 1 1956-1970s: THE FIRST YEARS, Tollefson the Magnificent The first tale I ever heard about how the Department of Earth Sciences started hearkens out of the mid-1950s. Oscar W. Tollefson, who had almost graduated from the Univ. of Colorado (Ph D in geology), found himself sitting next to Colorado State College (CSC) President Bill Ross on a commercial flight between Washington, D.C. and Denver. Tolley, as he was universally known in professional circles, was the loquacious sort and so of course he struck up a conversation with a guy who, it turns out, was an amateur rock , fossil, and mineral collector. Bill Ross came from a background in buildings and grounds and knew a lot about earth materials and weather! Though we don’t know exactly what was said in that four hours, we do know that Bill Ross recognized a rare enthusiasm for teaching and learning in the young Tolley. Ross also probably recognized that Tolley’s persuasiveness and persistence would go a long way at the growing College. The Earth Sciences academic program was founded at Colorado State College (CSC) in 1956 by Dr.
    [Show full text]
  • The Flood Of'82
    A window of opportunity The flood of '82 was clearly tragic in terms of life and property loss. But the area of impact was quickly recognized as a place for learning, and Out of disaster scientists gathered to study the impacts of the comes knowledge — flood, especially the recovery of high altitude eco­ systems. The studies will continue for decades. In this instance both of the workings of nature and Here are some research findings: the failures of mankind's works. The lessons are sharp, but they do give guidance for the future. The Flood Plant succession Those lessons are now being applied across the 35 species of willows and grasses were found nation, to manage or remove other high mountain growing after the first full season. dams. of'82 Bird populations The number of bird species living in the area has increased since the flood. Dam break modeling WARNING: Predictive models helped to reconstruct the be­ Streambanks are lined with dangerously havior of water in such a flood. unstable boulders. For your safety stay on the paved trail. Sedimentation studies Revealed downstream movement of distinctive lobes of fine sediment. Art: Bill Border The Lawn Lake flood of July 15, 1982 is an On steep slopes the "wet brown cloud" tore Park filled, then the water crashed forward —over experience the people in the Estes Valley will re­ through the ground and scoured 50 feet or more Cascade Dam, through Aspenglen Campground member for a long time. It affected many people into the earth. On gentler slopes the water on the edge of Rocky Mountain National Park, that day, but months passed before the events dropped sand, gravel, boulders, and battered and down Fall River.
    [Show full text]
  • 30Th Anniversary of the Lawn Lake Dam Failure: a Look Back at the State and Federal Response July 27, 2012 Mark E
    30th Anniversary of the Lawn Lake Dam Failure: A Look Back at the State and Federal Response July 27, 2012 Mark E. Baker, P.E. National Park Service, Denver, CO Bill McCormick, P.E., P.G., Colorado Division of Water Resources, Salida, CO ABSTRACT On July 15, 1982, deep in Rocky Mountain National Park, the 26-foot high Lawn Lake Dam failed. The resulting flood charged down a mountain carving deep ravines and depositing huge fields of rock. It also wiped out campsites, tragically killing 3 people. The flood inundated businesses in the town of Estes Park and caused $31 million in damages. This paper describes how the State of Colorado (State) and Federal agencies responded to the event. The many impacts of this dam failure are explored so that the dam safety community can be better prepared to handle the myriad of issues associated with dam failures efficiently. The paper reviews the State’s response including communications immediately following the failure and the details of conducting a dam failure investigation, including the forensic analysis to determine likely failure mechanisms. Changes to the State dam safety program as a result of the failure are described. The effects of the failure on the NPS dam safety program, including the decision to remove other dams within Rocky Mountain National Park are also explored. The role of FEMA in coordinating post- failure research studies conducted by Federal agencies, including the USGS, USBR, and the NPS are also discussed. Finally, the paper describes the types of legal investigations conducted and lawsuits filed following the failure.
    [Show full text]
  • Rocky Mountain National Park Geologic Resource Evaluation Report
    National Park Service U.S. Department of the Interior Geologic Resources Division Denver, Colorado Rocky Mountain National Park Geologic Resource Evaluation Report Rocky Mountain National Park Geologic Resource Evaluation Geologic Resources Division Denver, Colorado U.S. Department of the Interior Washington, DC Table of Contents Executive Summary ...................................................................................................... 1 Dedication and Acknowledgements............................................................................ 2 Introduction ................................................................................................................... 3 Purpose of the Geologic Resource Evaluation Program ............................................................................................3 Geologic Setting .........................................................................................................................................................3 Geologic Issues............................................................................................................. 5 Alpine Environments...................................................................................................................................................5 Flooding......................................................................................................................................................................5 Hydrogeology .............................................................................................................................................................6
    [Show full text]
  • Big Thompson Flood
    , .. r . .. ~ ...... 1 . ,.' Twenty Years Later ' , < . , , . ~ ," ':L '~, ", ~ ' What ,~We Have . ":"' learned' Since the ".,!.,.. 'f . Big thompson flood .... '.. .. ~ .. , ' . .. <o?; f . .- , : -: ..... >, '. , . Proceedings of a Meeting . Held in Fort Collins, Colorado , . July 13-15, 1996. • > • '. TWENTY YEARS LA TER WHAT WE HAVE LEARNED SINCE THE BIG THOMPSON FLOOD Eve Gruntfest Editor Proceedings of a Meeting Held in Fort Collins, Colorado July 13-15, 1996 Special Publication No. 33 Natural Hazards Research and Applications Information Center University of Colorado Boulder, Colorado The opinions contained in this volume are those of the authors and do not necessarily represent the views of the funding or sponsoring organiza­ tions. The use of trademarks or brand names.in these papers is not intended as an endorsement of any product. Published 1997. This volume is available from: The Natural Hazards Research and Applications Information Center Institute of Behavioral Science Campus Box 482 University of Colorado Boulder, CO 80309-0482 tel: (303) 492-6819 fax: (303) 492-2151 e-mail: [email protected] WWW: http://www .colorado. edu/hazards ii TABLE OF CONTENTS Table of Contents . .. iii Acknowledgments .............................. vii List of Abbreviations ............................ ix List of Participants . x INTRODUCTION AND OVERVIEW ................... 1 PART 1: FEDERAL PERSPECTIVE Barriers and Opportunities in Mitigation Richard W. Krimm ............................ 15 The Bureau of Reclamation and Dam Safety Howard Gunnarson ........................... 21 Flood Warning/Preparedness Programs of the Corps of Engineers Kenneth Zwickl .............................. 26 PART II: DAM SAFETY Olympus Dam Early Warning System David B. Fisher . 31 Dams, Defects, and Time Wayne J. Graham ............................ 40 1996 Willamette and Columbia River Flood Cynthia A. Henriksen .......................... 50 PART III: HUMAN DIMENSIONS OF DISASTER Emergency Communications: A Survey of the Century's Progress and Implications for Future Planning Bascombe J.
    [Show full text]
  • Cache La Poudre River Management Plan
    CACHE LA POUDRE WILD AND SCENIC RIVER FINAL MANAGEMENT PLAN MARCH 1990 United States Department of Agriculture Forest Service Rocky Mountain Region Arapaho and Roosevelt National Forests Estes-Poudre Ranger District Larimer County, Colorado For Information Contact: Michael D. Lloyd, District Ranger 148 Remington Street Fort Collins, CO 80525 (303) 482-3822 CACHE LA POUDRE WILD AND SCENIC RIVER MANAGEMENT PLAN TABLE OF CONTENTS PAGE I. INTRODUCTION A. PURPOSE 1 B. LOCATION AND MAPS 1-3 C. LEGISLATIVE HISTORY 4 D. AREA DESCRIPTION 5 E. VISION FOR THE FUTURE 8 II RECREATIONAL RIVER MANAGEMENT A. RECREATION 1. Overnight camping 11 2. picnicking, Fishing and River Access 11 3. Kayaking and Non-commercial Rafting 13 4. Commercial Rafting 14 5. Trails 16 6. Information and Interpretation 17 B. CULTURAL RESOURCES 18 C. SCENIC QUALITY 19 D. VEGETATION 20 E. ROADS 21 F. WATER 22 G. FISHERIES 24 H. WILDLIFE 25 I. FIRE 26 J. OTHER LAND USES 27 III. WILD RIVER MANAGEMENT A. RECREATION 29 B. WATER 30 C. WILDLIFE AND FISHERIES 31 D. FIRE, INSECTS AND DISEASE 31 E. OTHER LAND USES 31 IV. SUMMARY OF PROJECTS AND COSTS 32 V. APPENDIX A. BOUNDARY MAPS 37 B. SITE SPECIFIC RECOMMENDATIONS 46 C. WATER QUANTITY 54 D. RECREATION CAPACITY 56 E. COOPERATION WITH LARIMER COUNTY 63 F. COOPERATION WITH STATE AGENCIES 67 G. LAWS, FOREST PLAN, AND OTHER AUTHORITIES 71 H. CONSULTATION WITH OTHERS 76 I. BIBLIOGRAPHY 79 I. INTRODUCTION A. PURPOSE The purpose of this plan is to identify Forest Service actions needed to manage and protect the Cache La Poudre Wild and Scenic River and adjacent lands.
    [Show full text]
  • An Evaluation of the Cache La Poudre Wild and Scenic River Draft Environmental Impact Statement and Study Report by Michael J
    An Evaluation of the Cache La Poudre Wild and Scenic River Draft Environmental Impact Statement and Study Report by Michael J. Eubanks Information Series Report No. 43 AN EVALUATION OF THE CACHE LA POUDRE WILD AND SCENIC RIVER DRAFT ENVIRONMENTAL IMPACT STATEMENT AND STUDY REPORT By Michael J. Eubanks Submitted to The Water Resources Planning Fellowship Steering Committee Colorado State University in fulfillment of requirements for AE 795 AV Special Study in Planning August 1980 COLORADO WATER RESOURCES RESEARCH INSTITUTE Colorado State University Fort Collins, Colorado 80523 Norman A. Evans, Director ACKNOWLEDGEMENTS The author wishes to acknowledge the cooperation and helpful parti­ cipation of the many persons interviewed during preparation of this report. Their input was essential to its production. The moral support provided by my dearest friend and fiancee l Joan E. Moseley has been very helpful over the course of preparing this report. The guidance and contribution of my graduate committee is also acknowledged. The Committee consists of Norman A. Evans, Director of the Colorado Water Resources Research Institute and Chairman of the Committee; Henry Caulfield, Professor of Political Science; R. Burnell Held, Professor of Outdoor Recreation; Victor A. Koelzer, Professor of Civil Engineering; Kenneth C. Nobe, Chairman of the Department of Economics; and Everett V. Richardson, Professor of Civil Engineering. EXECUTIVE SUMMARY This critique of the Draft Environmental Impact Statement-Study Report (DEIS/SR) found it deficient with respect to several of the statutory requirements and guidelines by which it was reviewed. The foremost criticism of the DEIS/SR concerns its failure to develop and evaluate a water development (representing economic development) alternative to the proposed wild and scenic 'river designation of the Cache La Poudre.
    [Show full text]
  • Rocky Mountain National Park Park
    Inside this Issue Join the Celebration Find us on your favorite social media platform to join in on special events, • Important Info This year marks one hundred years since photos, videos, and more! • Staying Safe Rocky was established. See the special insert • Centennial Information to learn about 100 years of Wilderness, • Ranger-led Programs Wildlife, and Wonder, and the events @Rockynps #rmnp • Fun Things to Do: Hiking, planned to celebrate the centennial birthday. Camping & More! National Park Service Rocky U.S. Department of the Interior Mountain The official newspaper National of Rocky Mountain National Park Park Park News Spring 2015 March 22, 2015 - June 13, 2015 Enjoy Your Visit By Katy Sykes, Information Office Manager What pictures in your mind does the word "springtime" conjure up? Fields of flowers, baby animals, twittering birds? How about white mountains and snowfalls measured in feet? Springtime in Rocky Mountain National Park is all of these and more. Actually, springtime in Rocky can feel like any season of the year: sunny, snowy, rainy, windy, warm, and cold. Spring days can be gorgeous with crystal blue skies and bright sunshine that pours down over the mountains. But traditionally, some of the park’s biggest snowfalls occur in March and April. Snow into early June up on the mountaintops is not uncommon. Trail Ridge Road is scheduled to open for the season on May 22 this year, but its opening is always weather-dependent and it stays open as long as weather and road conditions permit. Spring snows are usually quite wet, which is great for forest fire prevention but not always great for activities like snowshoeing, Dream Lake in springtime NPS/John Marino backcountry skiing, and early season hiking.
    [Show full text]
  • Report 2008–1360
    The Search for Braddock’s Caldera—Guidebook for Colorado Scientific Society Fall 2008 Field Trip, Never Summer Mountains, Colorado By James C. Cole,1 Ed Larson,2 Lang Farmer,2 and Karl S. Kellogg1 1U.S. Geological Survey 2University of Colorado at Boulder (Geology Department) Open-File Report 2008–1360 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D.Myers, Director U.S. Geological Survey, Reston, Virginia 2008 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Cole, James C., Larson, Ed, Farmer, Lang, and Kellogg, Karl S., 2008, The search for Braddock’s caldera—Guidebook for the Colorado Scientific Society Fall 2008 field trip, Never Summer Mountains, Colorado: U.S. Geological Survey Open-File Report 2008–1360, 30 p. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. 2 Abstract The report contains the illustrated guidebook that was used for the fall field trip of the Colorado Scientific Society on September 6–7, 2008. It summarizes new information about the Tertiary geologic history of the northern Front Range and the Never Summer Mountains, particularly the late Oligocene volcanic and intrusive rocks designated the Braddock Peak complex.
    [Show full text]
  • High Altitude Revegetation Workshop and Central Rockies Chapter of The
    High Altitude Revegetation Workshop and Central Rockies Chapter of the Society For Ecological Restoration 2015 Conference March 10-12, 2015 Fort Collins, Colorado Advertisements i ii Table of Contents Conference Organizing Committees ............................................................................................................... 1 Tuesday March 10, 2015. ................................................................................................................................... 2 8:00 – 12:00 Preconference Workshop – Learning to Adapt: Monitoring Throughout the Restoration Process (special registration event). ............................................................................... 2 1:00 Opening Remarks, Randy Mandel CeRSER and Mark Paschke HAR, Ballroom AB ............... 3 1:05 Welcome, John Hayes, Dean of the Warner College of Natural Resources, CSU ..................... 3 1:15 Keynote address: “Novel ecosystems – targets or turn-offs? Jim Harris, Cranfield University ................................................................................................................................................................... 3 1:50 – 3:10 Session 1: Novel Ecosystems, Moderated by Mark Paschke. ............................................ 4 3:30 – 4:50 Session 2: Complex Projects, Moderated by Randy Mandel. ............................................. 5 4:50 – 7:00 Poster Session / Mixer, Ballroom CD (Poster abstract start on page 27) ........................ 6 7:00 – 9:00 Student – Professional Mixer
    [Show full text]