USGS PUBLICATIONS
OTHER PUBLICATIONSJournal Articles and other non-USGS Publications USGS Publications WarehouseABOUT THE CO WATER SCIENCE CENTERUSGS IN YOUR STATEUSGS Water Science Centers are located in each state. 
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USGS Colorado Water Science Center Publications
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| 2018 |
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 Geophysical Research Origin of methane and sources of high concentrations in Los Angeles groundwater By J. T. Kulongoski, P. B. McMahon, M. T. Land, M. T. Wright, T. A. Johnson, M. K. Landon PDF ( 0 KB) | Online Journal Article |
| 2017 |
 Environmental Science & Technology Methane and Benzene in Drinking-Water Wells Overlying the Eagle Ford, Fayetteville, and Haynesville Shale Hydrocarbon Production Areas By Peter B. McMahon, Jeannie R.B. Barlow, Mark A. Engle, Kenneth Belitz Patricia B. Ging, Andrew G. Hunt, Bryant C. Jurgens, Yousif K. Kharaka, Roland W. Tollett, and Timothy M. Kresse PDF ( 0 KB) | Online Journal Article |
| 2016 |
 U.S. Geological Survey Scientific Investigations Report 2016-5134 Groundwater and surface-water interaction, water quality, and processes affecting loads of dissolved solids, selenium, and uranium in Fountain Creek near Pueblo, Colorado, 2012-2014 By L. Rick Arnold, Roderick F. Ortiz, Christopher R. Brown, and Kenneth R. Watts |
 Science of the Total Environment Controls on selenium distribution and mobilization in an irrigated shallow groundwater system underlain by Mancos Shale, Uncompahgre River Basin, Colorado, USA By Taylor J. Mills, M. Alisa Mast, Judith Thomas, Gabrielle Keith PDF ( 0 KB) | Online Journal Article |
 Open-File Report 2016-1100 Preliminary Results from Exploratory Sampling of Wells for the California Oil, Gas, and Groundwater Program, 2014-15 By Peter B. McMahon, Justin T. Kulongoski, Michael T. Wright, Michael T. Land, Matthew K. Landon, Isabelle M. Cozzarelli, Avner Vengosh, and George R. Aiken |
 U.S. Geological Survey Scientific Investigations Report 2016-5047 Response of selenium concentrations in groundwater to seasonal canal leakage, lower Gunnison River Basin, Colorado, 2013 By J.I. Linard, P.B. McMahon, L.R. Arnold, and J.C. Thomas |
 U.S. Geological Survey Scientific Investigations Report 2016-5020 Groundwater quality, age, and susceptibility and vulnerability to nitrate contamination with linkages to land use and groundwater flow, Upper Black Squirrel Creek Basin, Colorado, 2013 By Tristan P. Wellman and Michael G. Rupert |
| 2015 |
 U.S. Geological Survey Scientific Investigations Report 2015-5147 Characterization of hydrology and water quality of Piceance Creek in the Alkali Flat area, Rio Blanco County, Colorado, March 2012 By Judith C. Thomas |
 Data Series 955 Installation of a groundwater monitoring-well network on the east side of the Uncompahgre River in the Lower Gunnison River Basin, Colorado, 2014 By Judith C. Thomas |
 Groundwater Chemical Considerations for an Updated National Assessment of Brackish Groundwater Resources By P.B. McMahon, J. K. Böhlke, K.G. Dahm, D.L. Parkhurst, D.W. Anning, and J.S. Stanton PDF ( 0 KB) | Online Journal Article |
 Data Series 923 Installation of a Groundwater Monitoring-Well Network on the East Side of the Uncompahgre River in the Lower Gunnison River Basin, Colorado, 2012 By Judith C. Thomas and Larry R. Rick Arnold |
 Open-File Report 2014-1261 Analysis of Historic Agricultural Irrigation Data from the Natural Resources Conservation Service Monitoring and Evaluation for Grand Valley, Lower Gunnison Basin, and McElmo Creek Basin, Western Colorado, 1985 to 2003 By John W. Mayo |
 Circular 1360 Water Quality in Principal Aquifers of the United States, 1991-2010 By Leslie A. DeSimone, Peter B. McMahon, and Michael R. Rosen |
 Circular 1357 Water Quality in the Denver Basin Aquifer System, Colorado, 2003-05 By Nancy J. Bauch, MaryLynn Musgrove, Barbara J. Mahler, and Suzanne S. Paschke |
| 2014 |
 Open-File Report 2014-1231 Monitoring-Well Installation, Slug Testing, and Groundwater Quality for Selected Sites in South Park, Park County, Colorado, 2013 By L.R. Arnold |
Groundwater Quality and Age of Shallow Groundwater in the Bakken Formation Production Area, Williston Basin, Montana and North Dakota By P.B. McMahon, R.R. Caldwell, J.M. Galloway, J.F. Valder, and A.G. Hunt PDF ( 0 KB) | Online Journal Article |
 U.S. Geological Survey Scientific Investigations Report 2014-5172 Groundwater Levels in the Denver Basin Bedrock Aquifers of Douglas County, Colorado, 2011-2013 By Rhett R. Everett |
 U.S. Geological Survey Scientific Investigations Report 2014-5095 Groundwater and Surface-Water Interaction and Potential for Underground Water Storage in the Buena Vista-Salida Basin, Chaffee County, Colorado, 2011 By Kenneth R. Watts, Tamara Ivahnenko, Robert W. Stogner, and James F. Bruce |
 Open-File Report 2014-1158 Two Decision-Support Tools for Assessing the Potential Effects of Energy Development on Hydrologic Resources as Part of the Energy and Environment in the Rocky Mountain Area Interactive Energy Atlas By Joshua I. Linard, Anne Marie Matherne, Kenneth J. Leib, Natasha B. Carr, James E. Diffendorfer, Sarah J. Hawkins, Natalie Latysh, Drew A. Ignizio, and Nils C. Babel |
 U.S. Geological Survey Scientific Investigations Report 2014-5051 Quality of Groundwater in the Denver Basin Aquifer System, Colorado, 2003-5 By By MaryLynn Musgrove, Jennifer A. Beck, Suzanne S. Paschke, Nancy J. Bauch, and Shana L. Mashburn |
 U.S. Geological Survey Scientific Investigations Report 2013-5074 Water Quality at a Biosolids-Application Area near Deer Trail, Colorado, 1993-1999 By Tracy J.B. Yager |
 Techniques and Methods 6-A50 Two Graphical User Interfaces for Managing and Analyzing MODFLOW Groundwater-Model Scenarios By Edward R. Banta |
 U.S. Geological Survey Scientific Investigations Report 2013-5218 Assessment of the quality of groundwater and the Little Wind River in the area of a former uranium processing facility on the Wind River Reservation, Wyoming, 1987 through 2010 By Anthony J. Ranalli and David L. Naftz |
| 2013 |
 Techniques and Methods 6-A48 GWM-VI-Groundwater Management with Parallel Processing for Multiple MODFLOW Versions By Edward R. Banta and David P. Ahlfeld |
Environmental Science and Technology Groundwater Ages and Mixing in the Piceance Basin Natural Gas Province, Colorado By Peter B. McMahon, Judith C. Thomas, and Andrew G. Hunt PDF ( 0 KB) | Online Journal Article |
 Fact Sheet 2013-3047 Chemistry and Age of Groundwater in the Piceance Structural Basin, Rio Blanco County, Colorado, 2010-12 By P.B. McMahon, J.C. Thomas, and A.G. Hunt |
 U.S. Geological Survey Scientific Investigations Report 2013-5132 Chemistry and Age of Groundwater in Bedrock Aquifers of the Piceance and Yellow Creek Watersheds, Rio Blanco County, Colorado, 2010-12 By P.B. McMahon, J.C. Thomas, and A.G. Hunt |
 U.S. Geological Survey Scientific Investigations Report 2013-5065 Effects of surface applications of biosolids on groundwater quality and trace-element concentrations in crops near Deer Trail, Colorado, 2004-2010 By Tracy J.B. Yager, James G. Crock, David B. Smith, Edward T. Furlong, Philip L. Hageman, William T. Foreman, James L. Gray, and Rhiannon C. ReVello |
| 2012 |
 U.S. Geological Survey Scientific Investigations Report 2012-5198 Overview of groundwater quality in the Piceance Basin, western Colorado, 1946–2009 By J.C. Thomas and P.B. McMahon |
 U.S. Geological Survey Scientific Investigations Report 2012-5220 Use of classes based on redox and groundwater age to characterize the susceptibility of principal aquifers to changes in nitrate concentrations, 1991 to 2010 By P.B. McMahon |
 U.S. Geological Survey Scientific Investigations Report 2012-5056 Preliminary assessment of sources of nitrogen in groundwater at a biosolids-application area near Deer Trail, Colorado, 2005 By Tracy J.B. Yager and Peter B. McMahon |
U.S. Geological Survey Scientific Investigations Report 2012-5140 Demonstration optimization analyses of pumping from selected Arapahoe aquifer municipal wells in the west-central Denver Basin, Colorado, 2010-2109 By Edward R. Banta and Suzanne S. Paschke |
 Data Series 718 Groundwater-quality and quality-control data for two monitoring wells near Pavillion, Wyoming, April and May 2012 By Peter R. Wright, Peter B. McMahon, David K. Mueller, and Melanie L. Clark |
Open-File Report 2012-1197 Sampling and analysis plan for the characterization of groundwater quality in two monitoring wells near Pavillion, Wyoming By Peter R. Wright and Peter B. McMahon |
 U.S. Geological Survey Scientific Investigations Report 2012-5049 Methods for evaluating temporal groundwater quality data and results of decadal-scale changes in chloride, dissolved solids, and nitrate concentrations in groundwater in the United States, 1988-2010 By Bruce D. Lindsey and Michael G. Rupert |
| 2011 |
 Professional Paper 1770 Groundwater Availability of the Denver Basin Aquifer System, Colorado By Suzanne S. Paschke |
 U.S. Geological Survey Scientific Investigations Report 2011-5085 Hydrogeologic Setting and Simulation of Groundwater Flow near the Canterbury and Leadville Mine Drainage Tunnels, Leadville, Colorado By Tristan P. Wellman, Suzanne S. Paschke, Burke Minsley, and Jean A. Dupree |
Open-File Report 2011-1213 MODFLOW-CDSS, a Version of MODFLOW-2005 with Modifications for Colorado Decision Support Systems By Edward R. Banta |
 Data Series 589 Biosolids, crop, and groundwater data for a biosolids-Application area near Deer Trail, Colorado, 2007 and 2008 By Yager, T.J.B., Smith, D.B., and Crock, J.G. |
 Open-File Report 2011-1146 Analytical Results for Municipal Biosolids Samples from a Monitoring Program Near Deer Trail, Colorado (U.S.A.), 2010 By J.G. Crock, D.B. Smith, T.J.B. Yager, C.J. Berry, and M.G. Adams |
Techniques and Methods 6-E4 ModelMate-A Graphical User Interface for Model Analysis By Edward R. Banta |
 U.S. Geological Survey Scientific Investigations Report 2011-5001 Estimates of Deep-Percolation Return Flow Beneath a Flood- and a Sprinkler-Irrigated Site in Weld County, Colorado, 2008-2009 By L.R. Arnold |
| 2010 |
 U.S. Geological Survey Scientific Investigations Report 2010-5215 Use of Diverse Geochemical Data Sets to Determine Sources and Sinks of Nitrate and Methane in Groundwater, Garfield County, Colorado, 2009 By P.B. McMahon, J.C. Thomas, and A.G. Hunt |
 Data Series 543 Digital map of the aquifer boundary of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming By Sharon Qi |
Open-File Report 2010-1162 Analytical Results for Municipal Biosolids Samples from a Monitoring Program Near Deer Trail, Colorado (U.S.A.), 2009 By J.G. Crock, D.B. Smith, T.J.B. Yager, C.J. Berry, and M.G. Adams |
Data Series 507 Geographic Information System Datasets of Regolith-Thickness Data, Regolith-Thickness Contours, Raster-Based Regolith Thickness, and Aquifer-Test and Specific-Capacity Data for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado By L. Rick Arnold |
 U.S. Geological Survey Scientific Investigations Report 2010-5082 Hydrogeology and Steady-State Numerical Simulation of Groundwater Flow in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado By L. Rick Arnold |
 Scientific Investigations Report 2010-5019 Land-Use Analysis and Simulated Effects of Land-Use Change and Aggregate Mining on Groundwater Flow in the South Platte River Valley, Brighton to Fort Lupton, Colorado By L.R. Arnold, C.S. Mladinich, W.H. Langer, and J.S. Daniels |
 Scientific Investigations Report 2009-5048 Analysis of Dissolved Selenium Loading from Surface Water and Groundwater to Sweitzer Lake, Colorado, 2006-07 By Judith C. Thomas |
| 2009 |
Data Series 472 Depth to Water, Saturated Thickness, and Other Geospatial Datasets Used in the Design and Installation of a Groundwater Monitoring-Well Network in the High Plains Aquifer, Colorado By Jennifer L. Flynn, L. Rick Arnold, and Suzanne S. Paschke |
Data Series 461 Probability of elevated volatile organic compound (VOC) concentrations in groundwater in the Eagle River watershed valley-fill aquifer, Eagle County, North-Central Colorado, 2006-2007 By Michael G. Rupert and L. Niel Plummer |
Data Series 460 Probability of unmixed young groundwater (defined using chlorofluorocarbon-11 concentrations and tritium activities) in the Eagle River watershed valley-fill aquifer, Eagle County, North-Central Colorado, 2006-2007 By Michael G. Rupert and L. Niel Plummer |
Data Series 459 Probability of elevated nitrate concentrations in groundwater in the Eagle River watershed valley-fill aquifer, Eagle County, North-Central Colorado, 2006-2007 By Michael G. Rupert and L. Niel Plummer |
Open-File Report 2009-1111 Analytical Results for Municipal Biosolids Samples from a Monitoring Program Near Deer Trail, Colorado (U.S.A.), 2008 By J.G. Crock, D.B. Smith, T.J.B. Yager, C.J. Berry, and M.G. Adams |
Data Series 458 Boundary of the Eagle River watershed valley-fill aquifer, Eagle County, North-Central Colorado, 2006-2007 By Michael G. Rupert and L. Niel Plummer |
 Data Series 456 Design and Installation of a Groundwater Monitoring-Well Network in the High Plains Aquifer, Colorado By L.R. Arnold, J.L. Flynn, and S.S. Paschke |
 Scientific Investigations Report 2009-5082 Groundwater Quality, Age, and Probability of Contamination, Eagle River Watershed Valley-Fill Aquifer, North-Central Colorado, 2006-2007 By Michael G. Rupert and L. Niel Plummer |
 Techniques and Methods 6-A28 User Guide and Documentation for Five MODFLOW Ground-Water Modeling Utility Programs By Edward R. Banta, Suzanne S. Paschke, and David W. Litke |
 Techniques and Methods 6-A27 User Guide for HUFPrint, A Tabulation and Visualization Utility for the Hydrogeologic-Unit Flow (HUF) Package of MODFLOW By Edward R. Banta and Alden M. Provost |
 Scientific Investigations Report 2009-5126 Identifying Hydrologic Processes in Agricultural Watersheds Using Precipitation-Runoff Models By Joshua I. Linard, David M. Wolock, Richard M.T. Webb, and Michael E. Wieczorek |
 Scientific Investigations Report 2008-5243 Occurrence of Selected Organic Compounds in Groundwater Used for Public Supply in the Plio-Pleistocene Deposits in East-Central Nebraska and the Dawson and Denver Aquifers near Denver, Colorado, 2002-2004 By Jeffrey B. Bails, Benjamin J. Dietsch, Matthew K. Landon, and Suzanne S. Paschke |
 Fact Sheet 2009-3041 Redox Conditions in Selected Principal Aquifers of the United States By P.B. McMahon, T.K. Cowdery, F.H. Chapelle, and B.C. Jurgens |
 Data Series 379 Biosolids, Crop, and Ground-Water Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2004 Through 2006 By Tracy J.B. Yager, David B. Smith, and James G. Crock |
 Circular 1333 Recharge Rates and Chemistry Beneath Playas of the High Plains Aquifer - A Literature Review and Synthesis By Jason J. Gurdak and Cassia D. Roe |
Ground Water Distinguishing Iron-Reducing from Sulfate-Reducing Conditions By Francis H. Chapelle, Paul M. Bradley, Mary Ann Thomas, and Peter B. McMahon PDF ( 0 KB) | Online Journal Article |
 Water Resources Research Effects of simplifying fracture network representation on inert chemical migration in fracture-controlled aquifers By Tristan P. Wellman Allen M. Shapiro and Mary C. Hill PDF ( 0 KB) | Online Journal Article |
| 2008 |
 Scientific Investigations Report 2008-5020 Availability, Sustainability, and Suitability of Ground Water, Rogers Mesa, Delta County, Colorado - Types of Analyses and Data for Use in Subdivision Water-Supply Reports By Kenneth R. Watts |
Computers & Geosciences Building model analysis applications with the Joint Universal Parameter IdenTification and Evaluation of Reliability (JUPITER) API By Edward R. Banta, Mary C. Hill, Eileen Poeter, John E. Doherty, and Justin Babendreier PDF ( 0 KB) | Online Journal Article |
Ground Water Redox processes and water quality of selected principal aquifer systems By P.B. McMahon and F.H. Chapelle PDF ( 0 KB) | Online Journal Article |
Journal of Environmental Quality Near-Decadal Changes in Nitrate and Pesticide Concentrations in the South Platte River Alluvial Aquifer, 1993 - 2004 By Suzanne S. Paschke, Keelin R. Schaffrath, and Shana L. Mashburn PDF ( 0 KB) | Online Journal Article |
Journal of Environmental Quality Decadal-Scale Changes of Nitrate in Ground Water of the United States, 1988 - 2004 By Michael G. Rupert PDF ( 0 KB) | Online Journal Article |
Vadose Zone Journal Susceptibility to enhanced chemical migration from depression-focused preferential flow, High Plains Aquifer By Jason J. Gurdak, Michelle A. Walvoord, and Peter B. McMahon PDF ( 0 KB) | Online Journal Article |
Water Resources Research Source and transport controls on the movement of nitrate to public supply wells in selected principal aquifers of the United States By P.B. McMahon, J.K. Böhlke, L.J. Kauffman, K.L. Kipp, M.K. Landon, C.A. Crandall, K.R. Burow, and C.J. Brown PDF ( 0 KB) | Online Journal Article |
Water Resources Research Simulated response of water quality in public supply wells to land use change By P. B. McMahon, K. R. Burow, L. J. Kauffman, S. M. Eberts, J. K. Böhlke, and J. J. Gurdak PDF ( 0 KB) | Online Journal Article |
| 2007 |
 Scientific Investigations Report 07-5220 Ground-Water Quality and Potential Effects of Individual Sewage Disposal System Effluent on Ground-Water Quality in Park County, Colorado, 2001-2004 By Lisa D. Miller and Roderick F. Ortiz |
Professional Paper 1737-A Hydrogeologic Settings and Ground-Water Flow Simulations for Regional Studies of the Transport of Anthropogenic and Natural Contaminants to Public-Supply Wells Studies Begun in 2001 By Edited Suzanne S. Paschke |
Vadose Zone Journal Climate variability controls on unsaturated-zone water and chemical movement, High Plains aquifer By Jason J. Gurdak, Randall T. Hanson, Peter B. McMahon, Breton W. Bruce, John E. McCray, Geoffrey D. Thyne, and Robert C. Reedy PDF ( 0 KB) | Online Journal Article |
| 2006 |
 Scientific Investigations Report 06-5315 Dissolved Solids in Basin-Fill Aquifers and Streams in the Southwestern United States By David W. Anning, Nancy J. Bauch, Steven J. Gerner, Marilyn E. Flynn, Scott N. Hamlin, Stephanie J. Moore, Donald H. Schaefer, Scott K. Anderholm, and Lawrence E. Spangler |
 Scientific Investigations Report 06-5184 Application of a stream-aquifer model to Monument Creek for Development of a method to estimate transit losses for reusable water, El Paso County, Colorado By Gerhard Kuhn and Rick Arnold |
 Scientific Investigations Report 06-5129 Hydrostratigraphic Framework of the Raton, Vermejo, and Trinidad Aquifers in the Raton Basin, Las Animas County, Colorado By Kenneth R. Watts |
 Scientific Investigations Report 06-5109 A Preliminary Evaluation of Vertical Separation between Production Intervals of Coalbed-Methane Wells and Water-Supply Wells in the Raton Basin, Huerfano and Las Animas Counties, Colorado, 1999-2004 By Kenneth R. Watts |
 Scientific Investigations Report 06-5050 Vulnerability of Recently Recharged Ground Water in the High Plains Aquifer to Nitrate Contamination By Jason J. Gurdak and Sharon L. Qi |
Environmental Science and Technology Regional patterns in the isotopic composition of natural and anthropogenic nitrate in ground water By P.B. McMahon and J.K. Böhlke PDF ( 0 KB) | Online Journal Article |
| 2005 |
 Scientific Investigations Report 05-5179 Hydrogeology and Quality of Ground Water in the Upper Arkansas River Basin from Buena Vista to Salida, Colorado, 2000-2003 By Kenneth R. Watts |
 Scientific Investigations Report 05-5106 Quality of Nutrient Data from Streams and Ground Water Sampled During Water Years 1992-2001 By David K. Mueller and Cindy J. Titus |
 Scientific Investigations Report 05-5063 Variability of Differences between Two Approaches for Determining Ground-Water Discharge and Pumpage, Including Effects of Time Trends, Lower Arkansas River Basin, Southeastern Colorado, 1998-2002 By Brent M. Troutman, Patrick Edelmann, and Russell G. Dash |
 Fact Sheet 2005-3143 Sustainability of Ground-Water Resources in the Upper Arkansas River Basin between Buena Vista and Salida, Colorado, 2000-2003 By K.R. Watts |
| 2004 |
 Scientific Investigations Report 04-5290 Distribution and Mass of Nitrate in the Unconfined Aquifer Beneath the Intensively Cultivated Area North of the Rio Grande, San Luis Valley, Colorado, 1997 through 2001 By Robert W. Stogner, Sr |
 Scientific Investigations Report 04-5289 Effects of Surface Applications of Biosolids on Soil, Crops, Ground Water, and Streambed Sediment near Deer Trail, Colorado, 1999-2003 By Tracy J.B. Yager, David B. Smith, and James G. Crock |
 Open-File Report 2004-1404 Biosolids, Soil, Crop, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2002-2003 By Tracy J.B. Yager, David B. Smith, and James G. Crock |
 Open-File Report 2004-1388 Biosolids, Soil, Crop, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2001 By Tracy J.B. Yager, David B. Smith, and James G. Crock |
 Fact Sheet 2004-3127 Wastewater Chemicals in Colorado's Streams and Ground Water By Lori A. Sprague and William A. Battaglin |
 Fact Sheet 2004-3097 Water-Level Changes in the High Plains Aquifer, Predevelopment to 2003 and 2002 to 2003 By V.L. McGuire |
 Fact Sheet 2004-3066 Ground-Water Quality of Granitic- and Volcanic-Rock Aquifers in Southeastern Park County, Colorado, July-August 2003 By Roderick F. Ortiz |
 Fact Sheet 2004-3065 Ground-Water Quality of Alluvial and Sedimentary-Rock Aquifers in the Vicinity of Fairplay and Alma, Park County, Colorado, September-October 2002 By Roderick F. Ortiz |
 Fact Sheet 2004-3051 Ground-Water Age and Flow at Great Sand Dunes National Monument, South-Central Colorado By Michael G. Rupert and L. Niel Plummer |
 Fact Sheet 2004-3009 Potential Effects of Individual Sewage Disposal System Density on Ground-Water Quality in the Fractured-Rock Aquifer in the Vicinity of Bailey, Park County, Colorado, 2001-2002 By Daniel L. Brendle |
| 2003 |
 Water-Resources Investigations Report 03-4275 Water-Quality Characteristics and Ground-Water Quantity of the Fraser River Watershed, Grand County, Colorado, 1998-2001 By Nancy J. Bauch and Jeffrey B. Bails |
 Water-Resources Investigations Report 03-4219 Ground-Water Quality Beneath Irrigated Agriculture in the Central High Plains Aquifer, 1999-2000 By Breton W. Bruce, Mark F. Becker, Larry M. Pope, and Jason J. Gurdak |
 Water-Resources Investigations Report 03-4172 Application of Tracer-Injection Techniques to Demonstrate Surface-Water and Ground-Water Interactions Between an Alpine Stream and the North Star Mine, Upper Animas River Watershed, Southwestern Colorado By Winfield G. Wright and Bryan Moore |
 Water-Resources Investigations Report 03-4171 Water Movement Through Thick Unsaturated Zones Overlying the Central High Plains Aquifer, Southwestern Kansas, 2000-2001 By P.B. McMahon, K.F. Dennehy, R.L. Michel, M.A. Sophocleous, K.M. Ellett, and D.B. Hurlbut |
 Open-File Report 03-400 Biosolids, Soil, Crop, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2000 By Tracy J.B. Yager, David B. Smith, James G. Crock, and Michael R. Stevens |
Ground Water Ground Water Occurrence and Contributions to Streamflow in an Alpine Catchment, Colorado Front Range By David W. Clow, L. Schrott, R. Webb, Donald H. Campbell, A. Torizzo, and Mark Dornblaser PDF ( 0 KB) | Online Journal Article |
| 2002 |
 Water-Resources Investigations Report 02-4269 Probability of Detecting Atrazine/Desethyl-atrazine and Elevated Concentrations of Nitrate in Ground Water in Colorado By Michael G. Rupert |
 Water-Resources Investigations Report 02-4247 Ground-water-quality assessment of shallow aquifers in the Front Range Urban Corridor, Colorado, 1954-98, By J.L. Flynn |
 Water-Resources Investigations Report 02-4236 Classification of Irrigated Land Using Satellite Imagery, the High Plains Aquifer, Nominal Date 1992 By Sharon L. Qi, Alexandria Konduris, David W. Litke, and Jean Dupree |
 Water-Resources Investigations Report 02-4058 Geophysical Logging to Determine Construction, Contributing Zones, and Appropriate Use of Water Levels Measured in Confined-Aquifer Network Wells, San Luis Valley, Colorado, 1998-2000 By Daniel L. Brendle |
Open-File Report 02-364 Analysis of Geophysical Logs from Six Boreholes at Lariat Gulch, Former U.S. Air Force Site PJKS, Jefferson County, Colorado By Frederick L. Paillet, Richard E. Hodges, and Barbara S. Corland |
 Open-File Report 02-051 Biosolids, Soils, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area near Deer Trail, Colorado, 1999 By Michael R. Stevens, Tracy J.B. Yager, David B. Smith, and James G. Crock |
| 2001 |
 Water-Resources Investigations Report 01-4190 Evaluation of Possible Alternatives to Lower the High Water Table of St. Charles Mesa, Pueblo County, Colorado By Daniel L. Brendle |
 Water-Resources Investigations Report 01-4028 Vertical Gradients in Water Chemistry in the Central High Plains Aquifer, Southwestern Kansas and Oklahoma Panhandle, 1999 By P.B. McMahon |
| 2000 |
 Water-Resources Investigations Report 00-4254 Historical Water-Quality Data for the High Plains Regional Ground-Water Study Area in Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1930-98 By David W. Litke |
Water-Resources Investigations Report 00-4011 Effects of the Paradox Valley Unit on dissolved solids, sodium, and chloride in the Dolores River near Bedrock, Colorado, Water Years 1988-98 By Watts, Kenneth R. |
 Open-File Report 00-214 Quality of ground water and surface water in an area of individual sewage disposal system use near Barker Reservoir, Nederland, Colorado, August-September 1998 By J.L. Flynn and L.B. Barber |
| 1999 |
 Water-Resources Investigations Report 99-4243 Ground-Water-Quality Assessment of Selected Wells in the Fraser River Watershed, Colorado, August 1998 By Lori E. Apodaca, C. Michelle Smith, and Jeffrey B. Bails |
 Water-Resources Investigations Report 99-4221 Comparison of two approaches for determining ground-water discharge and pumpage in the lower Arkansas River Basin, Colorado, 1997-98 By R.G. Dash, B.M. Troutman, and P.F. Edelmann |
| 1997 |
 Intergovermental Task Force on Monitoring Water Quality Conceptual Frameworks for Ground-Water-Quality Monitoring By Franke, O.L., and the Ground-Water Focus Group of the Intergovernmental Task Force on Monitoring Water Quality |
 Fact Sheet 004-97 Variability of nitrate concentrations in the shallow ground water in a selected area of the San Luis Valley, south-central Colorado By R.W. Stogner |
| 1995 |
 Open-File Report 95-450 Bibliography, indices, and data sources of water-related studies, Upper Colorado River Basin, Colorado and Utah,1872-1995 By N.J. Bauch and L.E. Apodaca |
| 1994 |
 Open-File Report 94-102 National Water-Quality Assessment Program - Upper Colorado River Basin By N.E. Driver |
