Dolores River Coalition

Total Page:16

File Type:pdf, Size:1020Kb

Dolores River Coalition September 9, 2011 Ms. Laura Kilpatrick, Esq. DOE ULP Program Manager Uranium Leasing Program Programmatic EIS Office of Legacy Management U.S. Department of Energy 11025 Dover Street, Suite 1000 Westminster, CO 80021 Re: Scoping comments on Uranium Leasing Program Programmatic Environmental Impact Statement Delivered via email: [email protected] Dear Ms. Kilpatrick: We are writing you as members of the Dolores River Coalition, a partnership of eighteen local, regional, state, and national groups working for improved management and protection of the Dolores River Corridor and watershed, from McPhee Reservoir near Dolores, Colorado to its confluence with the Colorado River at Dewey Bridge in Utah. Because of our ongoing partnership and collaborative work to support the river corridor, the watershed, and the communities in the basin, we are greatly concerned about the impacts from mining, milling, and transportation of uranium ore on the Southwest corner of Colorado and the Southwestern United States. Thank you for your decision to develop a full Programmatic Environmental Impact Statement (PEIS) for the Uranium Leasing Program (ULP), which will offer a vehicle to ensure that the environmental consequences, alternatives, and mitigation measures will be thoroughly evaluated under the National Environmental Policy Act. Included in this letter are the collective areas of general concern that our coalition request be addressed based on our ongoing work in the Dolores River watershed. Individual organizations within our coalition will also be submitting scoping comments that focus on their specific concerns. Our Coalition is united in the principle recognition that the Dolores River Basin is a unique local and national resource that provides significant ecological systems that benefit the natural environment, and support human habitation throughout the Dolores River basin and beyond. The tributaries and side canyons of the Dolores River contribute to these natural systems and to the basin’s national and regional significance that have been identified in public land planning processes and collaborative efforts for many years. It is essential that the Department of Energy (DOE) acknowledges the values that citizens have worked hard to recognize, support, and safeguard, and that the leasing program is compatible with citizen and agency efforts to protect these values. Cooperating agencies and collaborative processes The Dolores River Coalition and affiliates have been directly involved with various land management processes and collaborations in the Dolores River watershed including the Dolores River Dialogue, the Lower Dolores River Plan Working Group, the Gateway Stakeholder Roundtable, and recent resource management plans including the San Juan 1 Public Lands SEIS, a proposed Gothic Shale Master Leasing Plan, and the Bureau of Land Management’s Grand Junction and Uncompahgre Field Offices’ Resource Management Plan Revisions. These plans will provide the overall direction for public land management in the proposed leasing area for the next 20 years. DOE's leasing program interplays directly with these and other processes in geographic scope, and in related management decisions. Additionally, the DOE ULP could also affect findings of Wild and Scenic River suitability on the San Miguel and Dolores Rivers, and their tributaries. As such, cooperation with other agencies needs to be explicitly addressed, and management conflicts must be proactively mitigated. The DOE's analysis must include collaboration with these field offices and the other federal, state, and local cooperating agencies. The Dolores River Dialogue is a collaborative community discussion that has been focused on the Dolores River below McPhee Reservoir since 2004. The purpose statement of the DRD is as follows: The Dolores River Dialogue (DRD) is a coalition of diverse interests, whose purpose is to explore management opportunities, build support for and take action to improve the ecological conditions downstream of McPhee Reservoir while honoring water rights, protecting agricultural and municipal water supplies, and the continued enjoyment of rafting and fishing. The Lower Dolores River Plan Working Group (the Working Group) is a diverse stakeholder group which was formed by the DRD to provide feedback to the BLM San Juan Field Office for the agency’s corridor management plan below McPhee Reservoir, as well as to discuss wild and scenic suitability or appropriate alternatives. The Dolores River Coalition has participated in the DRD and the Working Group, which both include conservation, agriculture, water management, land management, recreational and governmental interests, among others. These collaborative stakeholder efforts have been extensive, and should not be diminished by the Uranium Leasing Program. Most recently the Working Group has been focused on ensuring that native fish are sustained in the Dolores below McPhee Reservoir where native fish populations are in sharp decline. More information on the status of native fish in the Lower Dolores and opportunities for improvement is available in the final report from the recent scientific inquiry called A Way Forward (http://ocs.fortlewis.edu/drd/way-forward.htm). The scientific analysis of native fish from A Way Forward should be considered in the DOE’s management decisions to ensure that management scenarios for native fish are not in conflict. Potential impacts to native fish, aquatic species, riparian habitat, and recreational values must be thoroughly addressed by the DOE. Further, the DOE must assess the impacts of uranium leasing on the river corridor and specifically detail how impacts to native fish and other sensitive species will be avoided. The Gateway Stakeholder Roundtable was a collaborative process initiated on behalf of the Mesa County Commissioners to assess the values and discuss future land management options in the Gateway and Northern Dolores area. The process identified a need for more discussions on how to protect the spectacular landscape that includes two Wilderness Study areas and seven Citizen Proposed Wilderness areas. Much of the natural landscape was identified as a shared-value for community members and diverse interest groups alike. The recreational values and scenic attributes of the greater Gateway area need to be protected, and any resource development must be thoughtfully assessed. Collectively, we must determine the extent to which uranium development is, or is not, compatible with the increase in recreation, and the scenic values that serve it, along the river and in the 2 surrounding landscapes throughout the Dolores River Basin. A socioeconomic analysis must be conducted to assess impacts of land use on the surrounding communities. Other factors will play a vital role in the final decision, such as impacts to the ecological systems that sustain the communities. The Dolores River Restoration Project is another collaborative effort that has been working diligently on developing and implementing a restoration plan throughout the Dolores River Watershed. Many agencies and organizations have been involved, and should be consulted to ensure that the Uranium Leasing Program is not in conflict with restoration efforts. Threats to Wilderness Quality Lands The Dolores River basin, from McPhee Reservoir to the confluence with the Colorado River, includes three Wilderness Study Areas (WSAs) and ten Citizen Wilderness Proposals (CWPs). These areas are under consideration for legislative protections, and thus disturbances to these areas must be avoided, and they should be excluded from the leasing tracts. In addition, Wilderness Study Areas are subject to specific protections pursuant to the BLM’s Interim Management Policy for Lands Under Wilderness Review. The alternatives need to encompass options that would withhold all these WSAs and CWPs from leasing and mining for a period of at least ten years, to permit completion of decisions to designate or specially manage such areas through legislation or pending administrative decisions. These areas host rare values associated with their remote or relatively undisturbed condition, including high densities of rare and imperiled species, dense concentration of critical wildlife habitat, prized hunting and angling opportunities, spectacular scenic resources, and rapidly vanishing opportunities for primitive recreation. This concentration of sensitive and rare natural resources, and the corollary alternative land uses based on sustainable utilization of these resources, must be carefully weighed in analysis of physical and economic impacts. Impacts to plant and animal species and communities Due to the lack of general or site specific data regarding impacts of past mining activities on plants, wildlife, and ecosystems, the DOE must thoroughly analyze the indirect, direct and cumulative impacts of the proposed leasing on threatened, endangered and sensitive species, and other rare and imperiled species and natural communities. Any designated Critical Habitat Areas should be excluded from the leasing tracts, and the PEIS must include an analysis of potential impacts to species that are not present on the lease tracts, but that inhabit the full project area, including the Dolores River and its tributaries, and a portion of the Colorado River downstream from the lease tracts. The DOE should use a combination of Colorado Division of Parks and Wildlife and Colorado Natural Heritage Program GIS data to determine species likely to be present in the
Recommended publications
  • Dolores River Restoration Partnership: a Private/Public Collaboration Dolores River Restoration Partnership
    DOLORES RIVER RESTORATION PARTNERSHIP: A PRIVATE/PUBLIC COLLABORATION DOLORES RIVER RESTORATION PARTNERSHIP • TIMELINE OF PARTNERSHIP • VISION AND GOALS OF PARTNERSHIP • WHY HAS THE DRRP BEEN SUCH A SUCCESSFUL PARTNERSHIP? • WHY THIS PARTNERSHIP HAS BEEN IMPORTANT TO THE BLM ORIGINS AND HISTORY OF DRRP • INITIAL RIPARIAN WORK ON SAN MIGUEL RIVER IN EARLY 2000’S – LED BY TNC, PRECURSOR TO THE DRRP. • 2009 – TNC AWARDED CONTRACT TO TAMARISK COALITION TO DEVELOP A STRATEGY FOR THE DOLORES RIVER (DR-RAP) • 2010 - DR-RAP FINALIZED • 2010 - FIRST MOU SIGNED • 2010 – FIRST BLM ASSISTANCE AGREEMENT • 2012 – AGO BLUE RIVERS DESIGNATION • 2015 – TRANSITION PLAN FINALIZED • 2015 – DOLORES RIVER HEALTHY LANDS FOCAL AREA • 2015 – SECOND MOU SIGNED • 2016 – SECOND BLM ASSISTANCE AGREEMENT DOLORES RIVER RESTORATION ACTION PLAN (DR-RAP) 1. IDENTIFIED A VISION: “A THRIVING DOLORES RIVER SYSTEM THAT IS ECOLOGICALLY, SOCIALLY, AND ECONOMICALLY SUSTAINABLE IN A MULTIUSE CONTEXT.” “A DOLORES RIVER WATERSHED DOMINATED BY NATIVE VEGETATION, WHERE THE THREATS FROM TAMARISK AND OTHER ASSOCIATED INVASIVE SPECIES HAVE BEEN MITIGATED AND THE RIPARIAN AREAS OF THE WATERSHED CONTINUE TO BECOME MORE NATURALLY FUNCTIONING, SELF-SUSTAINING, DIVERSE, AND RESILIENT OVER TIME.” DRRP MANAGEMENT GOALS Significantly increase the number of sustainable, healthy riparian plant Ecologic communities while reducing those dominated by tamarisk and other invasive, non-native plant species. Develop a professional, competitive, and efficient work force; improve Social aesthetic enjoyment;
    [Show full text]
  • Figure 12B-01. Mountainous Volcanic Region
    108°W 106°W F Ancestral ron t Rang LARIMER Uinta Sand Upl e ift Little Snake River Wash Ba North Platte River MOFFAT s Yampa River in JACKSON Park-Gore Range Axial ROUTT Ba s in Up li h ft rc as A ek e Dougl Cr White River GRAND 40°N Whi EXPLANATION RIO BLANCO 40°N te Ri Neogene Volcanics ver Upli Neogene Sediments ft Paleogene Volcanics Eagle River Blue River Paleocene-Cretaceous Intrusives Piceance Basin Roaring ForkCentral River Colorado TroughEAGLE Cretaceous Seaway Sediment GARFIELD Eagle River Sawatch Range Aquifers SUMMIT Mesozoic Sediment Aquifers Ancestral Rockies Basins Colorado River Precambrian Basement PITKIN Arkansas River East Muddy Creek Mountainous Region MESA LAKE PARK Unc Mountainous Valleys ompa ghre Up Colorado Plateaus Region lif DELTA t Laramide Basin Outlines Laramide Uplift Axis Uncompaghre Uplift G un Taylor River CHAFFEE nison Laramide Basin Axis GUNNISON Upl Ancestral Rockies Uplift Axis Uncompahgre River South Arkansas River ift Ancestral Rockies Basin Axis Paradox Basin FREMONT MONTROSE San Lui CUSTER s OURAY Up San Miguel River li ft 38°N SAN MIGUEL SAGUACHE 38°N Animas River HINSDALE DOLORES SAN JUAN Rio Grande MINERAL ag Dolores River n S West Dolores River ua J RIO GRANDE ALAMOSA e San MONTEZUMA n Dom Jua Archuleta Anticlinorium San Los Pinos River LA PLATA COSTILLA San Juan Piedra River Basin CONEJOS Tusas Uplift COSTILLA ARCHULETA COSTILLA 108°W 106°W 0 10 20 30 40 50 Miles Geology modified from Tweto (1979); structural features from Hemborg (1996). 0 10 20 30 40 50 Kilometers Figure 12b-01.
    [Show full text]
  • Gunnison River
    final environmental statement wild and scenic river study september 1979 GUNNISON RIVER COLORADO SPECIAL NOTE This environmental statement was initiated by the Bureau of Outdoor Recreation (BOR) and the Colorado Department of Natural Resources in January, 1976. On January 30, 1978, a reorganization within the U.S. Department of the Interior resulted in BOR being restructured and renamed the Heritage Conservation and Recreation Service (HCRS). On March 27, 1978, study responsibility was transferred from HCRS to the National Park Service. The draft environmental statement was prepared by HCRS and cleared by the U.S. Department of the Interior prior to March 27, 1978. Final revisions and publication of both the draft environmental statement, as well as this document have been the responstbility of the National Park Service. FINAL ENVIRONMENTAL STATEMENT GUNNISON WILD AND SCENIC RIVER STUDY Prepared by United States Department of the Interior I National Park Service in cooperation with the Colorado Department of Natural Resources represented by the Water Conservation Board staff Director National Par!< Service SUMMARY ( ) Draft (X) Final Environmental Statement Department of the Interior, National Park Service 1. Type of action: ( ) Administrative (X) Legislative 2. Brief description of action: The Gunnison Wild and Scenic River Study recommends inclusion of a 26-mile (41.8-km) segment of the Gunnison River, Colorado, and 12,900 acres (S,200 ha) of adjacent land to be classified as wild in the National Wild and Scenic Rivers System under the administration of the National Park Service and the Bureau of Land Management, U.S. D. I. This river segment extends from the upstream boundary of the Black Canyon of the Gunnison National Monument to approximately 1 mile (1.6 km) below the confluence with the Smith Fork.
    [Show full text]
  • Dolores River Desert Bighorn Sheep Herd (DBS-61) Executive Summary
    Dolores River Desert Bighorn Sheep Herd (DBS-61) Executive Summary GMUs: S-63 (Middle Dolores River) and S-64 (Upper Dolores River) Tier Status: Tier 1 Land Ownership: BLM 45%, Private 29%, USFS 24%, State 2%, 2018 Posthunt Population Estimate: 175 Average Length of Longest Horn (harvested rams): 31 “ Posthunt Population Estimate 300 Dolores River Herd 250 200 150 100 50 0 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Proposed Objective S63 S64 Dolores Herd Figure 1. DBS-61 posthunt population estimate 1987-2019. Background and Issue Summary: The Dolores River Desert Bighorn sheep herd (DBS-61) is located in southwest Colorado and occupies the canyon country of the Dolores River, and its tributaries, downstream of McPhee Reservoir. It consists of Game Management Units (GMUs) S-63 (Middle Dolores River) and S-64 (Upper Dolores River). The majority of the occupied bighorn habitat occurs on lands managed by the Bureau of Land Management (BLM). DBS-61 is a Tier 1 bighorn population and should be given the highest priority for inventory, habitat protection and improvement, disease prevention and research. Although bighorn sheep were likely indigenous, none were present in the past century. The current population was established beginning in 1986 with the release of 25 bighorn from Arizona. There have been a total of four transplants of desert bighorn into the Dolores Canyon. Population sources have been from Arizona (source for two transplants), Nevada, and Utah.
    [Show full text]
  • Wild and Scenic Rivers
    Analysis of the Management Situation Moab BLM Field Office CHAPTER 17 – WILD AND SCENIC RIVERS 17.1 RESOURCE OVERVIEW The Wild and Scenic Rivers Act of 1968 (WSRA) established legislation for a National Wild and Scenic Rivers System (NWSRS) to protect and preserve designated rivers throughout the nation in their free- flowing condition and to protect and preserve their immediate environments. The WSRA includes policy for managing designated rivers and created processes for designating additional rivers for the NWSRS. Section 5(d) of the Act directs federal agencies to consider the potential for national wild, scenic, and recreational river areas in all planning for the use and development of water and related land resources. A wild and scenic river (WSR) review is being conducted as part of the current Bureau of Land Management (BLM), Moab Field Office (FO) resource management planning process. The first phase of the WSR review is to inventory all potentially eligible rivers within the planning area to determine which of those rivers are eligible for consideration as part of the NWSRS. To be eligible, rivers must be free-flowing and possess at least one outstandingly remarkable value (ORV). ORVs are evaluated in the context of regional and/or national significance and must be river-related. Each river/segment determined to be eligible is then given a tentative classification based on the current level of human development associated with that river/segment. In the second phase of the WSR review, eligible rivers are taken through the land use planning process of the resource management plan (RMP) to determine their "suitability" for designation as WSRs.
    [Show full text]
  • Gunnison-Dolores River Watershed
    United States Department of Agriculture - Colorado Natural Resources Conservation Service Gunnison-Dolores Rivers The Gunnison- Dolores Rivers Watershed Watershed totals 6,014,600 acres. Resources at work from October 1, 2010 - September 30, 2011 It includes all or por- tions of Delta, Gunni- son, Hinsdale, Mon- trose, Ouray, The Colorado Watershed Approach Saguache, and San Miguel Counties. Instead of the traditional statewide approach in NRCS natural resource addressing priority resource issues like soil erosion, specialists are staffed at the Delta, Gunnison, water quality, grazing lands, wildlife, and animal waste, and Montrose USDA NRCS looks to Colorado’s ten watersheds to identify their Field Service Centers to provide technical particular local resource needs and priorities. assistance to watershed residents. Watershed work groups meet annually to determine which NRCS Vision natural resource concerns are most prevalent in their Productive Lands - Healthy Environment communities. In turn, Colorado NRCS focuses its resources on NRCS Mission Helping People addressing those concerns. Colorado’s local Help the Land conservation districts provide leadership in this effort to foster increased decision making at the local level. www.co.nrcs.usda.gov High Priority Resource Concerns in the Gunnison-Dolores Rivers Watershed • Water Quantity • Water Quality • Rangeland Health • Invasive Species • Erosion Helping People Help the Land Watershed Profile Fiscal Year 2011 Environmental Quality Incentives Program Summary Applications Contracts
    [Show full text]
  • Sand Canyon & Rock Creek Trails
    Sand Canyon & Rock Creek Trails Canyons of the Ancients National Monument © Kim Gerhardt CANYONS OF THE ANCIENTS NATIONAL MONUMENT Ernest Vallo, Sr. Canyons of the CANYONS Eagle Clan, Pueblo of Acoma: Ancients National OF THE Monument ANCIENTS MAPS & INFORMATION When we come to and the Anasazi a place like Sand Heritage Center Anasazi Heritage Canyon, we pray Center to the ancestral 27501 Highway 184, Hovenweep people. As Indian Dolores, CO 81323 National Monument Canyons people we believe Tel: (970) 882-5600 of the 491 the spirits are Hours: Ancients still here. National Monument 9–5 Summer Mar.- Oct. We ask them Road G for our strength 10–4 Winter Nov.- Feb. and continued https://www.blm.gov/ 160 Mesa Verde survival, and programs/national- 491 National Park thank them conservation-lands/ colorado/canyons-of-the- for sharing their home place. In the Acoma ancients language I say, “Good morning. I’ve brought A public land administered my friends. If we approached in the wrong way, by the Bureau of Land please excuse our ignorance.” Management. 2 Please Stay on Designated Trails Welcome to the Sand Canyon & Rock Creek Trails 3 anyons of the Ancients National Monument was created to protect cultural and Cnatural resources on a landscape scale. It is part of the Bureau of Land Management’s National Landscape Conservation System and includes almost 171,000 acres of public land. The Sand Canyon and Rock Creek Trails are open for hiking, mountain biking, or horseback riding on designated routes only. Most of the Monument is backcountry. Visitors to Canyons of the Ancients are encouraged to start at the Anasazi Heritage Center near Dolores, Mountain Biking Tips David Sanders Colorado, where they can get current information from local rider Dani Gregory: Park Ranger, Canyons of the Ancients: about the Monument and experience the museum’s • Hikers and bikers are supposed to stop for • All it takes is for exhibits, films, and hands-on discovery area.
    [Show full text]
  • DOLORES RIVER CANYON TOURS These Tours Will Guide You Through the Scenic and Historic Paradox Valley Country and the Spectacular Canyons Formed by Its Waterways
    PARADOX VALLEY DOLORES RIVER CANYON TOURS These tours will guide you through the scenic and historic Paradox Valley country and the spectacular canyons formed by its waterways. You will also have the option of taking only the River Canyon Tour, or branching off Paradox Valley into some interesting side tours. Allow at least two hours for the river canyon drive; depending on where you go PROMOTING AWARENESS, from there—hiking, driving, exploring—plan on several days to explore this colorful region. Low clearance UNDERSTANDING, APPRECIATION, and PRESERVATION of our area’s DOLORES vehicles not recommended on dirt roads, avoid these roads in wet and stormy weather, drive slowly watching PAST and PRESENT. for rocks and ruts, sharp curves and on-coming vehicles. Before you start, pick up the 141 Highway Tour, Long RIVER Park Mine Tour, and the Hanging Flume, and Uravan brochures. You will refer to these along the route. MUSEUM & OFFICE LOCATED ON THE SCENIC & HISTORIC UNAWEEP-TABEGUACHE BYWAY CANYON UPPER DOLORES RIVER CANYON Naturita, Colorado (970)865-2100 rimrocker.org [email protected] TOURS Beginning at the Naturita Visitor Center, drive west out of town and then north 13 miles on Highway 141. At MM 76.3 is the River Road, Y11 Turn left here at the metal buildings, and set your odometer to zero. You will follow this narrow dirt road for eleven miles along the river. The Dolores River was named “The River of Our Lady of Sorrows” by the 1776 Escalante Expedition. (See: Highway 141 Tour.) The river path was diverted through the Paradox Valley 70 million years ago, when it be- NUCLA NATURITA AREA CHAMBER OF COMMERCE gan to carve this canyon.
    [Show full text]
  • EXTREME FLOODING in the DOLORES RIVER BASIN Intro Final
    Extreme flooding in the Dolores River Basin, Colorado and Utah: insights from paleofloods, geochronology and hydroclimatic analysis Item Type text; Electronic Dissertation Authors Cline, Michael Logan Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 10/10/2021 03:39:40 Link to Item http://hdl.handle.net/10150/195522 EXTREME FLOODING IN THE DOLORES RIVER BASIN, COLORADO AND UTAH: INSIGHTS FROM PALEOFLOODS, GEOCHRONOLOGY AND HYDROCLIMATIC ANALYSIS By Michael Logan Cline _____________________________ A Dissertation Submitted to the Faculty of the DEPARTMENT OF GEOGRAPHY & REGIONAL DEVELOPMENT In Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY WITH A MAJOR IN GEOGRAPHY In the Graduate College THE UNIVERSITY OF ARIZONA 2010 2 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE As members of the Dissertation Committee, we certify that we have read the dissertation prepared by Michael Logan Cline entitled Extreme flooding in the Dolores River Basin, Colorado and Utah: insights from paleofloods, geochronology and hydroclimatic analysis and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy _______________________________________________________________________ Date: 8/12/2010 Victor R. Baker _______________________________________________________________________ Date: 8/12/2010 Connie Woodhouse _______________________________________________________________________ Date: 8/12/2010 Stephen Yool _______________________________________________________________________ Date: 8/12/2010 Katie Hirschboeck Final approval and acceptance of this dissertation is contingent upon the candidate’s submission of the final copies of the dissertation to the Graduate College.
    [Show full text]
  • Geology of Unaweep Canyon and Its Role in the Drainage Evolution of the Northern Colorado Plateau
    CRevolution 2: Origin and Evolution of the Colorado River System II themed issue Soreghan et al. Geology of Unaweep Canyon and its role in the drainage evolution of the northern Colorado Plateau Gerilyn S. Soreghan1, Dustin E. Sweet2, Stuart N. Thomson3, Sara A. Kaplan1, Kristen R. Marra1, Greg Balco4, and Thaddeus M. Eccles1 1School of Geology and Geophysics, University of Oklahoma, 100 East Boyd Street, Norman, Oklahoma 73019, USA 2Department of Geosciences, Texas Tech University, 125 Science Building, Box 41053, Lubbock, Texas 79409, USA 3Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, Arizona 85721, USA 4Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, California 94709, USA ABSTRACT Thermochronological data from Precam- teau and is the only major canyon in the Colo- brian basement within Unaweep Canyon rado River drainage not occupied by a river. It Unaweep Canyon (Colorado, USA) is a and Permian strata at the western mouth penetrates Mesozoic strata deep into Precam- large, Precambrian-cored gorge that bisects of the canyon indicate onset of incision in brian crystalline basement, but paradoxically the Uncompahgre Plateau of the northeastern latest Miocene time (ca. 6–5 Ma), at a time- hosts two underfi t drainages, East Creek and Colorado Plateau, but has no through-fl ow- averaged rate of ~210–275 m/m.y. Onset of West Creek, which fl ow in opposite directions ing axial stream; it is drained by two underfi t canyon occupation and rapid incision by the from a gentle divide within the canyon (Figs. creeks (East and West Creek) that head at a ancestral Gunnison River coincided with the 1 and 2).
    [Show full text]
  • Late Quaternary Eolian and Alluvial Response to Paleoclimate, Canyonlands, Southeastern Utah
    Late Quaternary eolian and alluvial response to paleoclimate, Canyonlands, southeastern Utah Marith C. Reheis† Richard L. Reynolds Harland Goldstein U.S. Geological Survey, MS-980, Federal Center, Box 25046, Denver, Colorado 80225, USA Helen M. Roberts Institute of Geography and Earth Sciences, University of Wales, Aberystwyth SY23 3DB, Wales, UK James C. Yount U.S. Geological Survey, MS-980, Federal Center, Box 25046, Denver, Colorado 80225, USA Yarrow Axford Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, USA Linda Scott Cummings Paleo Research Institute, 2675 Youngfi eld Street, Golden, Colorado 80401, USA Nancy Shearin Bureau of Land Management, Monticello Field Offi ce, Monticello, Utah 84535, USA ABSTRACT began at ca. 6 ka and ended by ca. 3–2 ka, fol- sheets and dunes are common features of semi- lowed by a shift to drier modern conditions; arid regions, and their deposits and intercalated In upland areas of Canyonlands National localized mobilization of dune sand has per- paleosols potentially contain a long-term record Park, Utah, thin deposits and paleosols show sisted to the present. These interpretations of landscape response to climate fl uctuations. late Quaternary episodes of eolian sedimen- are similar to those of studies at the Chaco Mineral dust may strongly infl uence land- tation, pedogenesis, and climate change. dune fi eld, New Mexico, and the Tusayan scapes and ecosystems by adding materials to Interpretation of the stratigraphy and opti- dune fi eld, Arizona, and are consistent with soils that change their properties (e.g., Reheis cally stimulated luminescence ages of eolian paleoclimate interpretations of pollen and et al., 1995; Simonson, 1995; Herrmann et al., and nearby alluvial deposits, their pollen, packrat middens in the region.
    [Show full text]
  • Upper Colorado River and Its Utilization
    UNITED STATES DEPARTMENT OF THE INTERIOR Ray Lyman Wilbur, Secretary GEOLOGICAL SURVEY George Otts Smith, Director Water-Supply Paper 617 UPPER COLORADO RIVER AND ITS UTILIZATION BY ROBERT FOLLANSBEE f UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1929 For sale by the Superintendent of Documents, Washington, D. C. - * ' Price 85 cents CONTENTS Preface, by Nathan C. Grover______________________ ____ vn .Synopsis of report.-____________________________________ xi Introduction_________________________________________ 1 Scope of report--------__---__-_____--___--___________f__ 1 Index system____________________________________ _ ______ 2 Acknowledgments.._______-________________________ __-______ 3 Bibliography _ _________ ________________________________ 3 Physical features of basin________________-________________-_____-__ 5 Location and accessibility______--_________-__________-__-_--___ 5 Topography________________________________________________ 6 Plateaus and mountains__________________________________ 6 The main riyer_________________________________________ 7 Tributaries above Gunnison River_._______________-_-__--__- 8 Gunnison River_----_---_----____-_-__--__--____--_-_----_ IS Dolores Eiver____________________._______________________ 17 Forestation__________________ ______._.____________________ 19 Scenic and recreational features_-__-__--_____-__^--_-__________ 20 General features________________________.______--__-_--_ 20 Mountain peaks_________--_.__.________________________ 20 Lakes....__._______________________________
    [Show full text]