Unified Interior Regions

Region 7: Upper Colorado Basin

Map of Region 7: Upper Colorado Basin

Map of Region 7:  Upper Colorado Basin

Map Showing USGS/DOI Unified Region 7 and parts of adjoining Regions

Regions L2 Landing Page Tabs

USGS Science Centers in Region 7-Upper Colorado Basin conduct a large number of cooperative and collaborative projects with other agencies and partners. A sampling of those projects are shown below on this web page.

Filter Total Items: 388
Date published: September 13, 2016
Status: Active

White-Nose Syndrome Threatens the Survival of Hibernating Bats in North America

During the winter of 2006–2007, an affliction of unknown origin dubbed “white-nose syndrome” (WNS) began devastating colonies of hibernating bats in a small area around Albany, New York. Colonies of hibernating bats were reduced 80–97 percent at the affected caves and mines that were surveyed. Since then, white-nose syndrome or its causative agent have consistently spread more than 2,000...

Date published: September 1, 2016
Status: Active

The Wyoming Landscape Conservation Initiative (WLCI)

The Wyoming Landscape Conservation Initiative (WLCI) addresses effects of land-use and climate changes on Southwest Wyoming’s natural resources. In partnership with twelve Federal, State, and local natural resource agencies, and non-governmental organizations– FORT and ten other USGS centers are conducting dozens of integrated science projects to assess the status of Southwest Wyoming’s...

Date published: August 30, 2016
Status: Active

New Mexico Dendroecology Lab

Using tree ring analysis as a primary research tool, we conduct landscape-scale ecological research that focuses on the effects of climate variability on forest ecology, fire ecology, and ecohydrology. 

We are the only tree-ring lab in New Mexico, working in close collaboration with Bandelier National Monument and Emeritus Regents’ Professor Dr. Thomas Swetnam.  However, we were not the...

Date published: August 29, 2016
Status: Active

How and Why Upper Colorado River Basin Land, Water, and Fire Managers Choose to Use Drought Tools (or Not)

Preparing for and responding to drought requires integrating scientific information into complex decision making processes. In recognition of this challenge, regional drought early warning systems (DEWS) and related drought-information tools have been developed under the National Integrated Drought Information System (NIDIS). Despite the existence of many tools and information sources, however...

Date published: August 29, 2016
Status: Active

Ecological Responses to Fish Reclamation Treatments

Piscicides have been used in Rocky Mountain stream and lakes to restore native fish populations. In the last two decades concerns over piscicide effects to non-target organisms, primarily aquatic invertebrates, has increased. Although piscicides have been used for more than 70 years the impact to invertebrate assemblages has not been well studied and is largely unknown. Given the importance a...

Date published: August 18, 2016
Status: Active

Water Management Studies

As the need for incorporating biological objectives into water management decisions has grown, so has the need for methods and metrics to incorporate predictions of relevant biological responses into an increasingly complex decision environment that attempts to balance multiple uses. 

Date published: August 17, 2016
Status: Active

Negotiation Skills for Natural Resource Professionals: Building a Foundation

The Fort Collins Science Center's Social and Economic Analysis (SEA) Branch has been conducting and publishing research on multi-party natural resource negotiation since the 1980s. This research has led to the development of the basic negotiation training courses. This course is a mix of lecture, hands-on training, and discussion. Please join us and other natural resource professionals facing ...

Contacts: Nina Burkardt
Date published: August 16, 2016
Status: Archived

Pesticides in the Prairie Pothole Region

Wetlands of the northern Great Plains are crucial feeding grounds for migrating birds and waterfowl embedded in an agricultural landscape. Land use and hydrology can affect adult aquatic insects – crucial prey for critically declining populations of insectivorous birds. Current studies focus on effects of current-use pesticides on adult aquatic insects to inform decision making about...

Date published: August 12, 2016
Status: Archived

Potential Toxicity of Multiple Metals Associated with PGE Deposits

Water quality and aquatic life standards that are set by Federal and state regulatory agencies are used to evaluate the quality of our nation’s water and the health of aquatic ecosystems. These standards currently are based on hardness of the water and are determined for single metals, not for mixtures of metals that are typically found in natural systems. Metal mixtures can potentially be...

Date published: August 9, 2016
Status: Active

Conservation Genomics

Conservation genomics is a new field of science that applies novel whole-genome sequencing technology to problems in conservation biology. Rapidly advancing molecular technologies are revolutionizing wildlife ecology, greatly expanding our understanding of wildlife and their interactions with the environment.  In the same way that molecular tools such as microsatellites revolutionized wildlife...

Date published: August 8, 2016
Status: Active

Landscape Genetics

Landscape genetics is a recently developed discipline that involves the merger of molecular population genetics and landscape ecology.  The goal of this new field of study is to provide information about the interaction between landscape features and microevolutionary processes such as gene flow, genetic drift, and selection allowing for the understanding of processes that generate genetic...

Date published: August 1, 2016
Status: Active

Ecology of Insect-eating Bats

Bats are the only flying mammals that are active mostly at night and occur on all continents except Antarctica. Bats are ecologically diverse, with a range of species that specialize in feeding on fruit, nectar, blood, fish, small mammals, and insects. However, of the more than 1,100 known species of bats on Earth, the majority specialize in feeding on insects. In the United States for example...

USGS Science Centers in Region 7-Upper Colorado Basin collect a wide variety of natural resource data types including spatial, geologic, hydrologic, and biologic data. Data included in USGS-series publications that are not publically available in USGS databases are published in Data Releases. Tools are USGS products that can be used to analyze those types of data.

Filter Total Items: 279
Date published: June 15, 2017

Pressure Transducer Location Data of the South Platte River near Fort Morgan, Colorado, 2017

The USGS Colorado Water Science Center, in cooperation with the Colorado Water Conservation Board, collected hydraulic data for the South Platte River for areas adjacent to Fort Morgan, Colo., based on the USGS streamgage 06759500 South Platte River at Fort Morgan, CO. The hydraulic data include survey point data for 54 cross sections and 10 pressure transducers, which are used to rec

Date published: March 24, 2017

New Mexico Water-Quality Data

Ground-water and surface-water quality is one of the most critical concerns in the State of New Mexico. The major water-quality issue in New Mexico is preserving the quality of public drinking-water supply. Water-resource planning and water-quality assessment require a nationwide database with standardized information for planning and assessment of water resources.

Date published: March 24, 2017

New Mexico Groundwater Data

The U.S. Geological Survey (USGS) in New Mexico, in cooperation with the New Mexico Office of the State Engineer (NMOSE) and other Federal, State, and local agencies, currently monitors 1,800 groundwater wells dispersed throughout New Mexico in a 5-year rotation that have been measured continually since 1925; some well records go back even further.

Date published: March 24, 2017

New Mexico Surface-Water Data

The U.S. Geological Survey operates and maintains approximately 7,300 streamgages nationwide, 126 here in New Mexico, which provide long-term, accurate, and unbiased information that meets the needs of many diverse users. The USGS collects the streamflow data needed by Federal, State, and local agencies for planning and operating water-resources projects and regulatory programs.

Date published: March 20, 2017

New Mexico Water Use

The USGS compiles water-use data from numerous sources for all parts of the county, and since 1950 has published a series of Circulars on the estimated use of water in the United States at 5-year intervals. These Circulars contain State-level estimates of the amount of public- and self-supplied water used for commercial, domestic, industrial, irrigation, livestock, mining, and power generation...

Date published: March 7, 2017

Catchment-flowline network and selected model inputs for an enhanced and updated spatially referenced statistical assessment of dissolved-solids load sources and transport in streams of the Upper Colorado River Basin

This USGS data release consists of the synthetic stream network and associated catchments used to develop spatially referenced regressions on watershed attributes (SPARROW) model of dissolved-solids sources and transport in the Upper Colorado River Basin as well as geology and selected Basin Characterization Model (BCM) data used as input to the model.

Date published: February 2, 2017

A Multiscale Index of Landscape Intactness for the Western United States

Landscape intactness has been defined as a quantifiable estimate of naturalness measured on a gradient of anthropogenic influence. We developed a multiscale index of landscape intactness for the Bureau of Land Management’s (BLM) landscape approach, which requires multiple scales of information to quantify the cumulative effects of land use.

Date published: February 2, 2017

North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC)

Aquatic invertebrates are a key component of freshwater ecosystems, and an understanding of aquatic invertebrate taxonomy is central to freshwater science. The North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC) was created by the USGS Aquatic Experimental Lab (AXL) to provide users with high-quality digital microscopy photographs.

Date published: January 27, 2017

Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011

This study uses growth in vegetation during the monsoon season measured from LANDSAT imagery as a proxy for measured rainfall. NDVI values from 26 years of pre- and post-monsoon season Landsat imagery were derived across Yuma Proving Ground (YPG) in southwestern Arizona, USA.

Date published: January 27, 2017

Lower Rio Puerco geospatial data, 1935 - 2014

A long-term study of the geomorphic history of the lower Rio Puerco arroyo in north-central New Mexico included the collection of high-precision (Real-time kinematic) GPS survey data (2002, 2007, 2010, and 2014), registration and rectification of historical aerial photographs (1935, 1950s, 1970s, and 1996), aerial LiDAR survey (2005) and post-flood (2006) satellite imagery.

Date published: January 1, 2017

Bedrock-altitude contours for the base of the shallow groundwater system in the Lower Gunnison River Basin, Colorado

This dataset consists of contours showing the altitude of the top surface of well-consolidated bedrock at the base of the shallow groundwater system in the Lower Gunnison River Basin in Delta, Montrose, Ouray, and Gunnison Counties, Colorado. Bedrock altitude was contoured from values in the raster dataset bralt. The U.S. Geological Survey prepared this dataset in cooperation with the Col

Date published: January 1, 2017

Data release of the influence of data characteristics on detecting wetland/stream surface-water connections in the Delmarva Peninsula, Maryland and Delaware

The datasets were generated for the Upper Choptank River Watershed (UCRW) in Maryland and Delaware. Depressions and the total stream network were derived from a lidar DEM collected during April to June 2003 (vertical accuracy root mean square error (RMSE) = 14.3 cm) and March to April 2006 (vertical accuracy RMSE = 18.5 cm) for Maryland (1 m resolution) and April 2007 (v

USGS Science Centers in Region 7-Upper Colorado Basin produce hundreds of USGS-series publications, journal papers, and books each year that are subject to rigorous review by USGS specialists. The publications shown below on this page are related to study areas and staff members of USGS Science Centers in Region 7 compiled from the USGS Publications Warehouse.

Filter Total Items: 5,294
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Year Published: 2020

The geography of islands

Islands come in all shapes, sizes and types, from tiny rocky outcrops, to enormous continental landmasses. The true number of islands distributed in the planet’s seas and oceans is still elusive. Recent efforts bolstered by an abundance of detailed satellite imagery and the sophistication of geographic information systems (GIS) are bringing real...

Sayre, Roger; Martin, Madeline Thomas; Cress, Jill Janene; Holmes, Nick; McDermott-Long, Osgur; Weatherdon, Lauren; Spatz, Dena; VanGraafeiland, Keith; Will, David

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Year Published: 2020

Geochemistry and age of groundwater in the Williston Basin, USA: Assessing potential effects of shale-oil production on groundwater quality

Thirty water wells were sampled in 2018 to understand the geochemistry and age of groundwater in the Williston Basin and assess potential effects of shale-oil production from the Three Forks-Bakken petroleum system (TBPS) on groundwater quality. Two geochemical groups are identified using hierarchical cluster analysis. Group 1 represents the...

McMahon, Peter B.; Galloway, Joel M.; Hunt, Andrew; Belitz, Kenneth; Jurgens, Bryant; Johnson, Tyler D.

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Year Published: 2020

Assessment of undiscovered conventional oil and gas resources of Southeast Asia, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 10.5 billion barrels of oil and 271.5 trillion cubic feet of gas within 33 geologic provinces of Southeast Asia.

Schenk, Christopher J.; Mercier, Tracey J.; Woodall, Cheryl A.; Finn, Thomas M.; Le, Phuong A.; Marra, Kristen R.; Leathers-Miller, Heidi M.; Drake, Ronald M.
Schenk, C.J., Mercier, T.J., Woodall, C.A., Finn, T.M., Le, P.A., Marra, K.R., Leathers-Miller, H.M., and Drake, R.M., II, 2020, Assessment of undiscovered conventional oil and gas resources of Southeast Asia, 2020 (ver. 1.1, November 2020): U.S. Geological Survey Fact Sheet 2020–3046, 2 p., https://doi.org/10.3133/fs20203046.

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Year Published: 2020

Critical shifts in trace metal transport and remediation performance under future low river flows

Exceptionally low river flows are predicted to become more frequent and more severe across many global regions as a consequence of climate change. Investigations of trace metal transport dynamics across streamflows reveal stark changes in water chemistry, metal transformation processes, and remediation effectiveness under exceptionally low-flow...

Byrne, Patrick; Onnis, Patrizia; Runkel, Robert L.; Frau, Ilaria; Lynch, Sarah F.L.; Edwards, Paul

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Year Published: 2020

Landscape and climatic influences on actual evapotranspiration and available water using the Operational Simplified Surface Energy Balance (SSEBop) Model in eastern Bernalillo County, New Mexico, 2015

The U.S. Geological Survey, in cooperation with the Bernalillo County Public Works Division, conducted a 1-year study in 2015 to assess the spatial and temporal distribution of evapotranspiration (ET) and available water within the East Mountain area in Bernalillo County, New Mexico. ET and available water vary spatiotemporally because of complex...

Douglas-Mankin, Kyle R.; McCutcheon, Ryan J.; Mitchell, Aurelia C.; Senay, Gabriel B.
Douglas-Mankin, K.R., McCutcheon, R.J., Mitchell, A.C., and Senay, G.B., 2020, Landscape and climatic influences on actual evapotranspiration and available water using the Operational Simplified Surface Energy Balance (SSEBop) Model in eastern Bernalillo County, New Mexico, 2015: U.S. Geological Survey Scientific Investigations Report 2020–5095, 40 p., https://doi.org/10.3133/sir20205095.

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Year Published: 2020

Baseflow age distributions and depth of active groundwater flow in a snow‐dominated mountain headwater basin

Deeper flows through bedrock in mountain watersheds could be important, but lack of data to characterize bedrock properties limits understanding. To address data scarcity, we combine a previously published integrated hydrologic model of a snow‐dominated, headwater basin of the Colorado River with a new method for dating baseflow age using...

Carroll, Rosemary W.H.; Manning, Andrew H.; Niswonger, Richard G.; Marchetti, David W; Williams, Kenneth H.

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Year Published: 2020

Generalizing the inversion‐based PSHA source model for an interconnected fault system

This article represents a step toward generalizing and simplifying the procedure for constructing an inversion‐based seismic hazard source model for an interconnected fault system, including the specification of adjustable segmentation constraints. A very simple example is used to maximize understandability and to counter the notion that an...

Field, Edward H.; Milner, Kevin R.; Page, Morgan T.

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Year Published: 2020

Alkalic-type epithermal gold deposit model; Chapter R in Mineral deposit models for resource assessment

This report summarizes the primary characteristics of alkalic-type epithermal gold (Au) deposits and provides an updated descriptive model. These deposits, primarily of Mesozoic to Neogene age, are among the largest epithermal gold deposits in the world. Considered a subset of low-sulfidation epithermal deposits, they are spatially and genetically...

Kelley, Karen D.; Spry, Paul G.; McLemore, Virginia T.; Fey, David L.; Anderson, Eric D.
Kelley, K.D., Spry, P.G., McLemore, V.T., Fey, D.L., and Anderson, E.D., 2020, Alkalic-type epithermal gold deposit model: U.S. Geological Survey Scientific Investigations Report 2010–5070–R, 74 p., https://doi.org/ 10.3133/ sir20105070R.

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Year Published: 2020

Spatial variability in seasonal snowpack trends across the Rio Grande headwaters (1984 - 2017)

This study evaluated the spatial variability of trends in simulated snowpack properties across the Rio Grande headwaters of Colorado using the SnowModel snow evolution modeling system. SnowModel simulations were performed using a grid resolution of 100 m and 3-hourly time step over a 34-yr period (1984–2017). Atmospheric forcing was provided by...

Sexstone, Graham A.; Penn, Colin A.; Liston, Glen; Gleason, Kelly; Moeser, C. David; Clow, David W.

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Year Published: 2020

The firn meltwater Retention Model Intercomparison Project (RetMIP): Evaluation of nine firn models at four weather station sites on the Greenland ice sheet

Perennial snow, or firn, covers 80 % of the Greenland ice sheet and has the capacity to retain surface meltwater, influencing the ice sheet mass balance and contribution to sea-level rise. Multilayer firn models are traditionally used to simulate firn processes and estimate meltwater retention. We present, intercompare and evaluate outputs from...

Vandecrux, Baptiste; Mottram, Ruth; Langen, Peter; Fausto, Robert; Olesen, Martin; Stevens, C. Max; Verjans, Vincent; Leeson, Amber; Ligtenberg, Stefan; Kuipers Munneke, Peter; Marchenko, Sergey S.; van Pelt, Ward; Meyer, Colin R.; Simonsen, Sebastian B.; Heilig, Achim; Samimi, Samira; Marshall, Shawn J.; Machguth, Horst; MacFerrin, Michael J.; Niwano, Masashi; Miller, Olivia L.; Voss, Clifford I.; Box, Jason E.

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Year Published: 2020

Assessing uranium and select trace elements associated with breccia pipe uranium deposits in the Colorado River and main tributaries in Grand Canyon, USA

Assessing chemical loading from streams in remote, difficult-to-access watersheds is challenging. The Grand Canyon area in northern Arizona, an international tourist destination and sacred place for many Native Americans, is characterized by broad plateaus divided by canyons as much as two-thousand meters deep and hosts some of the highest-grade...

Tillman, Fred; Anderson, Jessica; Unema, Joel; Chapin, Thomas
Tillman, F.D, Anderson, J.R., Unema, J.A., and Chapin, T.P., 2020, Assessing uranium and select trace elements associated with breccia pipe uranium deposits in the Colorado River and main tributaries in Grand Canyon, USA. PLoS ONE, 15(11): e0241502.

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Year Published: 2020

Wildfire and landscape change

Wildfire is a worldwide phenomenon that is expected to increase in extent and severity in the future, due to fuel accumulations, shifting land management practices, and climate change. It immediately affects the landscape by removing vegetation, depositing ash, influencing water-repellent soil formation, and physically weathering boulders and...

Santi, Paul M.; Rengers, Francis K.

Photos and videos described and linked on this webpage come from a wide variety of USGS science activities and presentations performed by USGS Science Center staff members in the Region 7-Upper Colorado Basin.

Filter Total Items: 524
Tree in the Great Basin range
June 30, 2016

Great Basin

The Great Basin area in the northern Snake Range near the Utah/Nevada boarder. 

Photo showing the Great Basin area
June 30, 2016

Great Basin

The Great Basin area in the northern Snake Range near the Utah/Nevada boarder. 

Photo showing the Great Basin area
June 30, 2016

Great Basin

The Great Basin area in the northern Snake Range near the Utah/Nevada boarder. 

Photo showing the Great Basin area
June 30, 2016

Great Basin

The Great Basin area in the northern Snake Range near the Utah/Nevada boarder. 

An American bullfrog.
June 30, 2016

American bullfrog close-up

An American bullfrom is native to most eastern states, but considered invasive in the moutain west.

Using Landsat imagery to record burn severity and recovery.
June 17, 2016

Fire and Rebirth: Landsat Tells Yellowstone's Story

In the summer of 1988, a wildfire ravaged the world's first national park, consuming 1.2 million acres in and around the Greater Yellowstone Park ecosystem. Landsat imagery became an important record of the burn severity and recovery. The June 2016 image, captured by Landsat 8, portrays the widespread recovery of tree

...
USGS scientists Preparing for filming with BBC/PBS documentary crew
June 11, 2016

USGS scientists Preparing for filming with BBC/PBS documentary crew

USGS scientists preparing for filming with BBC/PBS documentary crew making "The Great Yellowstone Thaw"

USGS personnel collecting bathymetry data.
June 8, 2016

USGS personnel collecting bathymetry data.

USGS research vessel with Teledyne Odom Hydrographic ES3PT–M integrated multibeam echo sounder and motion sensor submerged on the port side, and Trimble SPS461 GPS receivers mounted on each side of vessel.

Image shows a woman in a green coat working with a drill core
June 3, 2016

Sarah Hawkins Receives the Core

USGS scientist Sarah Hawkins, lead scientist for the Mancos Shale assessment, examining a core drilled by the USGS Core Research Center. This core provided valuable data for the assessment. Image credit: Joshua Hicks, USGS.

Image shows a drill rig against blue mountains
June 3, 2016

Research Drilling Rig and Landscape

The USGS Core Research Center collaborated with the USGS Energy Resources Program to drill a core from the Mancos Shale to aid in the oil and gas assessment. Image Credit: Joshua Hicks, USGS.

Image: Canyonlands and the Colorado Plateau
May 9, 2016

Canyonlands and the Colorado Plateau

The Needles district of Canyonlands serves as a stunning backdrop to our study site in the high desert grassland of the Colorado Plateau. Researchers at Canyonlands Research Station are testing the effect of experimentally imposed altered precipitation regimes on plant reproductive success, mortality, and biomass.

Photo of the Colorado River near Moab, Utah
May 6, 2016

Colorado River Near Moab, Utah.

Water flowing on the Colorado River near Moab, Utah. 

The entire Colorado River Basin currently supports 50 million people, and that amount is expected to increase by 23 million between 2000 and 2030. A new USGS study shows more than half of the streamflow in the Upper Colorado River Basin originates as groundwater. 

News items shown on this page are highlights of selected studies conducted and publications produced by USGS Science Center staff members in Region 7-Upper Colorado Basin.

Filter Total Items: 362
USGS
September 29, 2010

Residents should not be alarmed to witness a low-flying helicopter over the San Antonio-Brokeoff Mountains region in Taos and Rio Arriba Counties starting around October 1.

USGS
September 1, 2010

LARAMIE, Wy. — Previous research has claimed that the reintroduction of wolves to Yellowstone National Park in 1995 is helping restore quaking aspen in risky areas where wolves prowl. But apparently elk hungry for winter food had a different idea.

USGS
August 25, 2010

TACOMA, Wash. — Washington’s only “benchmark” glacier continues to lose mass as a result of changes in climate, according to a report by the U.S. Geological Survey.

USGS
August 17, 2010

Congresswoman Betsy Markey, U.S. Department of the Interior Assistant Secretary Anne Castle and a number of other officials will celebrate the grand opening of a new scientific "think tank" on August 19 in Fort Collins, Colo.

USGS
July 19, 2010

Utah residents should not be alarmed to witness a low-flying airplane over parts of northern Utah during the next two weeks. 

USGS
June 16, 2010

Continued high flows in the upper North Platte River and its tributaries have resulted in the river reaching an all-time record at the USGS streamgage on the North Platte River above Seminoe Reservoir near Sinclair. The gage height of 11.6 feet reached on June 14, 2010 is 2.6 feet above the National Weather Service flood stage.

USGS
June 10, 2010

Reporters: Want to accompany a U.S. Geological Survey field crew as they measure flooding? Please contact Kirk Miller to coordinate.

USGS
June 9, 2010

Rapidly warming temperatures resulted in accelerated mountain snowmelt runoff in Utah that has caused flooding in the upper Provo, Weber, and Bear River basins as well as several basins draining the south slope of the Uinta Mountains.

USGS
May 24, 2010

Snow in the Colorado mountains is melting significantly earlier in the year, and the changes appear to be related to recent climate trends.

USGS
March 29, 2010

Brucellosis, a bacterial infection of cattle, elk and bison, appears to be increasing in several elk populations in northwestern Wyoming, according to a U.S. Geological Survey study recently released in the publication Ecological Applications.

USGS science for a changing world logo
December 3, 2009

Free maps are being offered by The Map Store @ USGS for use as holiday wrapping paper and in celebration of the 125th anniversary of national topographic mapping, which the U.S. Geological Survey (USGS) will honor on December 3.
Topographic maps became a signature product of the USGS because the public found them to be a versatile tool for viewing the nation's vast landscape.

This page includes links to Social Media accounts (top of page), Science Centers (middle of page), and Regional Office staff members (bottom of page) of the USGS Region 7--Upper Colorado Basin.

USGS Science Centers in Region 7-Upper Colorado Basin conduct a large number of cooperative, co-funded science and monitoring projects with many other Federal, Tribal, State, and local agencies. Please scroll below to see the agencies with which those Science Centers currently have cooperative agreements.

Filter Total Items: 324