Gold King Mine release (2015): USGS water-quality data and activities Active
On August 5, 2015, U.S. EPA was conducting an investigation of the Gold King Mine near Silverton, Colorado. While excavating as part of the investigation, water began leaking from the mine tunnel, and about three million gallons of water and sediment were released into Cement Creek, a tributary of the Animas River. The USGS provided pre- and post-release water-quality and streamflow data from nearby gages.
On August 5, 2015, a release of about three million gallons of water and sediment occurred at the Gold King Mine near Silverton, Colorado. At the time of the release, the U.S. Environmental Protection Agency (EPA) was conducting an investigation of the Gold King Mine to assess the on-going water releases from the mine, to treat mine water, and to assess the feasibility of further mine remediation. During exploratory excavation of the mine portal, pressurized water began leaking from the mine tunnel, releasing water and sediment into Cement Creek, a tributary of the Animas River.
This website provides:
- Easy access to USGS data in the area of the release
- Updates on recent USGS activities in the area of the release
For emergency response concerns or questions: Please contact the U.S. Environmental Protection Agency (EPA) or call the EPA hotline at 844-607-9700. The USGS is not a regulatory, permitting or enforcement agency; Federal government response to the Gold King Mine is coordinated by the EPA.
Current USGS Activities
The USGS Water Science Centers monitor current streamflow and water-quality conditions at various sites in the Animas and San Juan River Basins in Colorado, New Mexico, and Utah.
Streamgages at these sites provide continuous data on streamflow and select water-quality constituents including specific conductance, water temperature, pH, and turbidity. In addition, water samples are collected periodically for lab analysis of more constituents at several of the sites.
Subsequent to the Gold King Mine Release and in addition to USGS and EPA sampling, water-quality samples were collected and analyzed from sites on the Animas and San Juan Rivers by other Federal, State, tribal, and local agencies. All available data were compiled by the EPA Office of Research and Development (ORD) and are being made available to the public through the National Water Quality Monitoring Council (NWQMC) Water Quality Portal (WQP). The WQP is a cooperative service sponsored by the USGS, the EPA, and the NWQMC that serves data collected by over 400 Federal, State, tribal, and local agencies. The USGS is working with the EPA ORD to explore the use of all available data in developing statistical relations between field water-quality parameters and water-quality sampling results. The USGS is collaborating with the EPA ORD to:
- Assess quality of the water-quality data collected by other agencies
- Use these data as appropriate in developing statistical relations (regression models) between field water-quality parameters (indicators) and water-quality sampling results
- Identify gaps in the available data sets
Linear, multiple-linear, or logistic regression techniques may be used, depending on which method results in the best fit to the data and minimizes the error of prediction. If supported by the data and regression statistics, continuous-monitoring data from the USGS water-quality sondes can potentially be used as surrogates for metal concentrations in surface water. The resulting regression models will be published as a USGS Scientific Investigations Report in 2019.
USGS Activities in Response to Gold King Mine Release
At the request of the U.S. EPA, USGS hydrologists conducted an analysis of streamflow data from USGS streamgages along Cement Creek, Mineral Creek, and the Animas River near Silverton, Colorado. The results were used by U.S. EPA to estimate the amount of water released from the Gold King Mine on August 5, 2015.
In addition, the USGS has collected water and sediment samples:
- along Cement Creek upstream from Silverton,
- downstream along the Animas River from Silverton to the confluence with the San Juan River, and
- downstream along the San Juan River in neighboring New Mexico and Utah.
Current conditions of real-time sites:
- Cement Creek at Silverton, CO (09358550)
- Animas River at Silverton, CO (09358000)
- Mineral Creek at Silverton, CO (09359010)
- Animas River below Silverton, CO (09359020)
- Animas River at Durango, CO (09361500)
- Animas River near Cedar Hill, NM (09363500)
- Animas River below Aztec, NM (09364010)
- San Juan River at Farmington, NM (09365000)
- San Juan River at Shiprock, MN (09368000)
- San Juan River at Four Corners, CO (09371010)
- San Juan River near Bluff, UT (09379500)
Digital Database from Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado, 1996 to 2001:
- During the USGS Animas River watershed Abandoned Mine Lands Initiative between 1996 and 2001, scientists collected diverse data that describe and characterize the geology, geophysics, geography, biology, mining, and water quality of the Animas River watershed. Team scientists produced and compiled many layers of spatial digital data to support the multiple objectives of the Animas River watershed project.
- Base cartographic data covering the project study area were used to provide geographic reference for display of scientific information and results. The digital database accompanying the report contains these data and provides users with capabilities for viewing these data layers and for utilizing the information for user-defined purposes. The data not only are useful for cartographic displays of scientific results, but also can be used for watershed characterization, investigative analysis, and modeling.
The digital database is available online in the downloads directory as part of:
- Church, S.E., von Guerard, Paul, and Finger, S.E., eds., 2007, Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan County, Colorado: U.S. Geological Survey Professional Paper 1651, 1,096 p. plus CD-ROM. [In two volumes.]
For a complete description of the database, refer to Volume 2, Chapter G. Digital databases and CD-ROM for the Animas River watershed.
(Note: At this time, the water-quality data in this database are not available in the USGS National Water Information System [NWIS].)
Historical Data
The upper Animas River watershed near Silverton, Colorado, has been an area of extensive interdisciplinary USGS research on abandoned mine lands. Prior to mining in this area, the mineralized rocks were natural sources of metals and acidity to streams. Historical mining also contributed to the metals and acidity in streams of this area. Multiple USGS papers have been published about the environmental effects of unmined mineralized areas and historical mine sites in the Animas River watershed. These reports, and the data contained therein, provide a critical environmental baseline against which the effects of the Gold King Mine release can be assessed. The locations, types of data, and frequency of data vary based on the objectives of the USGS program or study for which they were collected.
Why do we need data from before the release?
Scientists can use data collected before the August 5, 2015, Gold King Mine release to help answer important questions, including:
- What were the water-quality conditions in Cement Creek and other downstream water bodies before the release?
- How did the release affect the water quality downstream?
- How will we know when downstream water bodies have recovered from the release?
Water-quality data
As part of our routine science activities, USGS collects water-quality data around the Nation, and the USGS has collected water-quality samples at a number of sites downstream from the Gold King Mine since the August 2015 release. The region near Silverton, Colorado, has been an area of extensive USGS research on abandoned mine lands and on natural sources of metals and acidity to streams. The locations, types of data, and frequency of data vary based on the objectives of the USGS program or study for which they were collected. Recent water-quality data for the Animas watershed are available from the National Water Information System (NWIS) website. Historical data for the Animas River watershed are available from the Downloads Directory of USGS Professional Paper 1651: Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed. Please visit the Data & Tools tab to see other databases that are available.
Satellite imagery
Satellite imagery of the Gold King Mine area is available from the USGS. The imagery includes both pre- and post-event data. The pre-event imagery starts around June 1, 2015. The post-event imagery continues to be collected. All data are being made available on the USGS Hazards Data Distribution System (HDDS).
To register on the HDDS system and request access to the licensed imagery, please use their instructions. Once registered on HDDS (Step 1), you will also need to follow Step 2: Request Restricted Access for event "201508_Spill_CO".
Please note: while it is possible to search for data on HDDS by event (201508_Spill_CO) without logging in, the search results only include up to 100 responsive items. To see the complete collection of publicly available data, users must register and log in.
The imagery focuses on the area around and downstream from the Gold King Mine, including:
- the Animas River and tributaries (including the headwaters of Cement Creek) and
- the San Juan River and its tributaries down to and including the San Juan Arm of Lake Powell.
Imagery below is being obtained from the following sources:
- WorldView: 1-4 meter data from the DigitalGlobe WorldView satellites. These data are licensed for response use only. Please contact bkjones@usgs.gov for more information.
- GeoEye: 1-4 meter data from the DigitalGlobe GeoEye satellites. These data are licensed for response use only. Please contact bkjones@usgs.gov for more information
- ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer): High-resolution (15- to 90-meter) multispectral data from the Terra satellite
- EO-1: 10- to 30-meter multispectral and hyperspectral data from the Earth Observing-1 (EO-1) Extended Mission
- GeoEye's OrbView-3 satellite
- Landsat 8: 15- to 30- meter multispectral data from Landsat 8
- Landsat 7: 15- to 30-meter multispectral data from Landsat 7
For a complete explanation of the satellite data types, refer to the USGS Earth Resources Observation Center (EROS) satellite imagery descriptions.
A news feed (RSS) of the satellite imagery is available.
Please contact bkjones@usgs.gov with questions about the satellite imagery or additional data requests.
Below are other science projects associated with the Gold King Mine release.
A Shallow to Deep View Inside the Hydrothermally Altered and Mineralized Silverton Caldera Complex: New Geologic Insights Gained From Modern Geophysical Interpretations
Lake Powell Coring
Monitoring for Potential Effects of the Gold King Mine Release on Water Quality in the Animas and San Juan Rivers in New Mexico using Continuous Monitors and Automatic Samplers
Below are multimedia items associated with Gold King Mine.
The region near Silverton, Colorado, has been an area of extensive USGS research on abandoned mine lands and on natural sources of metals and acidity to streams. For a selected bibliography of past reports, see the USGS Abandoned Mine Lands Initiative Upper Animas River area reports. For additional USGS reports about this area, please visit the USGS Publications Warehouse.
A GIS and statistical approach to identify variables that control water quality in hydrothermally altered and mineralized watersheds, Silverton, Colorado, USA
Using spatially detailed water-quality data and solute-transport modeling to improve support total maximum daily load development
Evaluating remedial alternatives for an acid mine drainage stream: A model post audit
An approach to quantify sources, seasonal change, and biogeochemical processes affecting metal loading in streams: Facilitating decisions for remediation of mine drainage
Geochemical data for Upper Mineral Creek, Colorado, under existing ambient conditions and during an experimental pH modification, August 2005
A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado
Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico
Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed
Copper isotope fractionation in acid mine drainage
The use of fluoride as a natural tracer in water and the relationship to geological features: Examples from the Animas River Watershed, San Juan Mountains, Silverton, Colorado
Understanding contaminants associated with mineral deposits
Metals fate and transport modelling in streams and watersheds: state of the science and USEPA workshop review
Historical water-quality and geospatial data related to the Gold King Mine release or collected near the Silverton, Colorado, area can be found at in USGS Professional Paper 1651: Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado (2008). Additional NWIS data from the time of the release are available for downl
Water Quality Portal
The Water Quality Portal integrates and provides access to publicly available water-quality data from databases such as USGS NWIS and BioData, EPA STORET, and USDA-ARS STEWARDS through a single search interface.
Current Streamflow and Water-Quality Monitoring at Select Sites in the Animas and San Juan River Basins, Colorado, New Mexico, and Utah
The USGS monitors current streamflow and water-quality conditions at various sites in the Animas and San Juan River Basins in Colorado, New Mexico, and Utah, including areas below the Gold King Mine release area. These streamgages provide continuous data on streamflow and select water-quality constituents including specific conductance, water temperature, pH, and turbidity.
Hazards Data Distribution System (HDDS) Explorer
The Hazards Data Distribution System (HDDSExplorer) is an event-based interface that provides a single point-of-entry for access to remotely sensed imagery and other geospatial datasets as they become available during a response.
Below are news stories associated with Gold King Mine.
- Overview
On August 5, 2015, U.S. EPA was conducting an investigation of the Gold King Mine near Silverton, Colorado. While excavating as part of the investigation, water began leaking from the mine tunnel, and about three million gallons of water and sediment were released into Cement Creek, a tributary of the Animas River. The USGS provided pre- and post-release water-quality and streamflow data from nearby gages.
On August 5, 2015, a release of about three million gallons of water and sediment occurred at the Gold King Mine near Silverton, Colorado. At the time of the release, the U.S. Environmental Protection Agency (EPA) was conducting an investigation of the Gold King Mine to assess the on-going water releases from the mine, to treat mine water, and to assess the feasibility of further mine remediation. During exploratory excavation of the mine portal, pressurized water began leaking from the mine tunnel, releasing water and sediment into Cement Creek, a tributary of the Animas River.
This website provides:
- Easy access to USGS data in the area of the release
- Updates on recent USGS activities in the area of the release
For emergency response concerns or questions: Please contact the U.S. Environmental Protection Agency (EPA) or call the EPA hotline at 844-607-9700. The USGS is not a regulatory, permitting or enforcement agency; Federal government response to the Gold King Mine is coordinated by the EPA.
Current USGS Activities
The USGS Water Science Centers monitor current streamflow and water-quality conditions at various sites in the Animas and San Juan River Basins in Colorado, New Mexico, and Utah.
Streamgages at these sites provide continuous data on streamflow and select water-quality constituents including specific conductance, water temperature, pH, and turbidity. In addition, water samples are collected periodically for lab analysis of more constituents at several of the sites.
Subsequent to the Gold King Mine Release and in addition to USGS and EPA sampling, water-quality samples were collected and analyzed from sites on the Animas and San Juan Rivers by other Federal, State, tribal, and local agencies. All available data were compiled by the EPA Office of Research and Development (ORD) and are being made available to the public through the National Water Quality Monitoring Council (NWQMC) Water Quality Portal (WQP). The WQP is a cooperative service sponsored by the USGS, the EPA, and the NWQMC that serves data collected by over 400 Federal, State, tribal, and local agencies. The USGS is working with the EPA ORD to explore the use of all available data in developing statistical relations between field water-quality parameters and water-quality sampling results. The USGS is collaborating with the EPA ORD to:
- Assess quality of the water-quality data collected by other agencies
- Use these data as appropriate in developing statistical relations (regression models) between field water-quality parameters (indicators) and water-quality sampling results
- Identify gaps in the available data sets
Linear, multiple-linear, or logistic regression techniques may be used, depending on which method results in the best fit to the data and minimizes the error of prediction. If supported by the data and regression statistics, continuous-monitoring data from the USGS water-quality sondes can potentially be used as surrogates for metal concentrations in surface water. The resulting regression models will be published as a USGS Scientific Investigations Report in 2019.
USGS Activities in Response to Gold King Mine Release
At the request of the U.S. EPA, USGS hydrologists conducted an analysis of streamflow data from USGS streamgages along Cement Creek, Mineral Creek, and the Animas River near Silverton, Colorado. The results were used by U.S. EPA to estimate the amount of water released from the Gold King Mine on August 5, 2015.
In addition, the USGS has collected water and sediment samples:
- along Cement Creek upstream from Silverton,
- downstream along the Animas River from Silverton to the confluence with the San Juan River, and
- downstream along the San Juan River in neighboring New Mexico and Utah.
Current conditions of real-time sites:
- Cement Creek at Silverton, CO (09358550)
- Animas River at Silverton, CO (09358000)
- Mineral Creek at Silverton, CO (09359010)
- Animas River below Silverton, CO (09359020)
- Animas River at Durango, CO (09361500)
- Animas River near Cedar Hill, NM (09363500)
- Animas River below Aztec, NM (09364010)
- San Juan River at Farmington, NM (09365000)
- San Juan River at Shiprock, MN (09368000)
- San Juan River at Four Corners, CO (09371010)
- San Juan River near Bluff, UT (09379500)
Digital Database from Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado, 1996 to 2001:
- During the USGS Animas River watershed Abandoned Mine Lands Initiative between 1996 and 2001, scientists collected diverse data that describe and characterize the geology, geophysics, geography, biology, mining, and water quality of the Animas River watershed. Team scientists produced and compiled many layers of spatial digital data to support the multiple objectives of the Animas River watershed project.
- Base cartographic data covering the project study area were used to provide geographic reference for display of scientific information and results. The digital database accompanying the report contains these data and provides users with capabilities for viewing these data layers and for utilizing the information for user-defined purposes. The data not only are useful for cartographic displays of scientific results, but also can be used for watershed characterization, investigative analysis, and modeling.
The digital database is available online in the downloads directory as part of:
- Church, S.E., von Guerard, Paul, and Finger, S.E., eds., 2007, Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan County, Colorado: U.S. Geological Survey Professional Paper 1651, 1,096 p. plus CD-ROM. [In two volumes.]
For a complete description of the database, refer to Volume 2, Chapter G. Digital databases and CD-ROM for the Animas River watershed.
(Note: At this time, the water-quality data in this database are not available in the USGS National Water Information System [NWIS].)
Historical Data
The upper Animas River watershed near Silverton, Colorado, has been an area of extensive interdisciplinary USGS research on abandoned mine lands. Prior to mining in this area, the mineralized rocks were natural sources of metals and acidity to streams. Historical mining also contributed to the metals and acidity in streams of this area. Multiple USGS papers have been published about the environmental effects of unmined mineralized areas and historical mine sites in the Animas River watershed. These reports, and the data contained therein, provide a critical environmental baseline against which the effects of the Gold King Mine release can be assessed. The locations, types of data, and frequency of data vary based on the objectives of the USGS program or study for which they were collected.
Why do we need data from before the release?
Scientists can use data collected before the August 5, 2015, Gold King Mine release to help answer important questions, including:- What were the water-quality conditions in Cement Creek and other downstream water bodies before the release?
- How did the release affect the water quality downstream?
- How will we know when downstream water bodies have recovered from the release?
Water-quality data
As part of our routine science activities, USGS collects water-quality data around the Nation, and the USGS has collected water-quality samples at a number of sites downstream from the Gold King Mine since the August 2015 release. The region near Silverton, Colorado, has been an area of extensive USGS research on abandoned mine lands and on natural sources of metals and acidity to streams. The locations, types of data, and frequency of data vary based on the objectives of the USGS program or study for which they were collected. Recent water-quality data for the Animas watershed are available from the National Water Information System (NWIS) website. Historical data for the Animas River watershed are available from the Downloads Directory of USGS Professional Paper 1651: Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed. Please visit the Data & Tools tab to see other databases that are available.
Satellite imagery
Satellite imagery of the Gold King Mine area is available from the USGS. The imagery includes both pre- and post-event data. The pre-event imagery starts around June 1, 2015. The post-event imagery continues to be collected. All data are being made available on the USGS Hazards Data Distribution System (HDDS).
To register on the HDDS system and request access to the licensed imagery, please use their instructions. Once registered on HDDS (Step 1), you will also need to follow Step 2: Request Restricted Access for event "201508_Spill_CO".
Please note: while it is possible to search for data on HDDS by event (201508_Spill_CO) without logging in, the search results only include up to 100 responsive items. To see the complete collection of publicly available data, users must register and log in.
The imagery focuses on the area around and downstream from the Gold King Mine, including:
- the Animas River and tributaries (including the headwaters of Cement Creek) and
- the San Juan River and its tributaries down to and including the San Juan Arm of Lake Powell.
Imagery below is being obtained from the following sources:
- WorldView: 1-4 meter data from the DigitalGlobe WorldView satellites. These data are licensed for response use only. Please contact bkjones@usgs.gov for more information.
- GeoEye: 1-4 meter data from the DigitalGlobe GeoEye satellites. These data are licensed for response use only. Please contact bkjones@usgs.gov for more information
- ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer): High-resolution (15- to 90-meter) multispectral data from the Terra satellite
- EO-1: 10- to 30-meter multispectral and hyperspectral data from the Earth Observing-1 (EO-1) Extended Mission
- GeoEye's OrbView-3 satellite
- Landsat 8: 15- to 30- meter multispectral data from Landsat 8
- Landsat 7: 15- to 30-meter multispectral data from Landsat 7
For a complete explanation of the satellite data types, refer to the USGS Earth Resources Observation Center (EROS) satellite imagery descriptions.
A news feed (RSS) of the satellite imagery is available.
Please contact bkjones@usgs.gov with questions about the satellite imagery or additional data requests. - Science
Below are other science projects associated with the Gold King Mine release.
A Shallow to Deep View Inside the Hydrothermally Altered and Mineralized Silverton Caldera Complex: New Geologic Insights Gained From Modern Geophysical Interpretations
The Silverton caldera complex in southwest Colorado hosts base and precious metals that have been mined since the late 1800s. Extensive mine workings, excellent bedrock exposures, and deeply incised drainages make this area a natural laboratory ideally suited for furthering our understanding of the mineral systems in a volcanic environment. In addition, state-of-the-art geophysical data processing...Lake Powell Coring
In response to the August 5, 2015, Gold King Mine Spill from the Bonita Peak Mining District that resulted in the release of three-million gallons of mine-impacted waters, the Utah Water Science Center, in partnership with the Utah Division of Water Quality, National Park Service, and U.S. Bureau of Reclamation, cored the San Juan and Colorado River deltas in multiple locations in Lake Powell...Monitoring for Potential Effects of the Gold King Mine Release on Water Quality in the Animas and San Juan Rivers in New Mexico using Continuous Monitors and Automatic Samplers
On August 5, 2015, about three million gallons of water and sediment were released from the Gold King Mine near Silverton, Colorado, into Cement Creek, a tributary of the Animas River. The New Mexico Environment Department, among other State, Tribal, and local entities in CO, NM, and UT, is concerned that metals associated with the water and sediment released from the Gold King Mine could have... - Multimedia
Below are multimedia items associated with Gold King Mine.
USGS Site Visit and Sampling at Gold King Mine, August 11-13, 2015USGS Site Visit and Sampling at Gold King Mine, August 11-13, 2015USGS Site Visit and Sampling at Gold King Mine, August 11-13, 2015 - Publications
The region near Silverton, Colorado, has been an area of extensive USGS research on abandoned mine lands and on natural sources of metals and acidity to streams. For a selected bibliography of past reports, see the USGS Abandoned Mine Lands Initiative Upper Animas River area reports. For additional USGS reports about this area, please visit the USGS Publications Warehouse.
Filter Total Items: 44A GIS and statistical approach to identify variables that control water quality in hydrothermally altered and mineralized watersheds, Silverton, Colorado, USA
Hydrothermally altered bedrock in the Silverton mining area, southwest Colorado, USA, contains sulfide minerals that weather to produce acidic and metal-rich leachate that is toxic to aquatic life. This study utilized a geographic information system (GIS) and statistical approach to identify watershed-scale geologic variables in the Silverton area that influence water quality. GIS analysis of mineAuthorsDouglas B. Yager, Raymond H. Johnson, Barnaby W. Rockwell, Jonathan S. Caine, Kathleen S. SmithUsing spatially detailed water-quality data and solute-transport modeling to improve support total maximum daily load development
Spatially detailed mass-loading studies and solute-transport modeling using OTIS (One-dimensional Transport with Inflow and Storage) demonstrate how natural attenuation and loading from distinct and diffuse sources control stream water quality and affect load reductions predicted in total maximum daily loads (TMDLs). Mass-loading data collected during low-flow from Cement Creek (a low-pH, metal-riAuthorsKatherine Walton-Day, Robert L. Runkel, Briant A. KimballEvaluating remedial alternatives for an acid mine drainage stream: A model post audit
A post audit for a reactive transport model used to evaluate acid mine drainage treatment systems is presented herein. The post audit is based on a paired synoptic approach in which hydrogeochemical data are collected at low (existing conditions) and elevated (following treatment) pH. Data obtained under existing, low-pH conditions are used for calibration, and the resultant model is used to prediAuthorsRobert L. Runkel, Briant A. Kimball, Katherine Walton-Day, Philip L. Verplanck, Robert E. BroshearsAn approach to quantify sources, seasonal change, and biogeochemical processes affecting metal loading in streams: Facilitating decisions for remediation of mine drainage
Historical mining has left complex problems in catchments throughout the world. Land managers are faced with making cost-effective plans to remediate mine influences. Remediation plans are facilitated by spatial mass-loading profiles that indicate the locations of metal mass-loading, seasonal changes, and the extent of biogeochemical processes. Field-scale experiments during both low- and high-floAuthorsB. A. Kimball, R.L. Runkel, K. Walton-DayGeochemical data for Upper Mineral Creek, Colorado, under existing ambient conditions and during an experimental pH modification, August 2005
Mineral Creek, an acid mine drainage stream in south-western Colorado, was the subject of a water-quality study that employed a paired synoptic approach. Under the paired synoptic approach, two synoptic sampling campaigns were conducted on the same study reach. The initial synoptic campaign, conducted August 22, 2005, documented stream-water quality under existing ambient conditions. A second synoAuthorsRobert L. Runkel, Briant A. Kimball, Judy I. Steiger, Katherine Walton-DayA comparison of pre- and post-remediation water quality, Mineral Creek, Colorado
Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic mass balance approach, in which numerous stream and infloAuthorsR.L. Runkel, K.E. Bencala, B. A. Kimball, K. Walton-Day, P. L. VerplanckNaturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico
Acidic, metal-rich waters produced by the oxidative weathering and resulting leaching of major and trace elements from pyritic rocks can adversely affect water quality in receiving streams and riparian ecosystems. Five study areas in the southern Rocky Mountains with naturally acidic waters associated with porphyry mineralization were studied to document variations in water chemistry and processesAuthorsP. L. Verplanck, D. Kirk Nordstrom, D. J. Bove, G.S. Plumlee, R.L. RunkelApplication of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed
Here the hydrogeochemical constraints of a tracer dilution study are combined with Fe and Zn isotopic measurements to pinpoint metal loading sources and attenuation mechanisms in an alpine watershed impacted by acid mine drainage. In the tested mountain catchment, δ56Fe and δ66Zn isotopic signatures of filtered stream water samples varied by ∼3.5‰ and 0.4‰, respectively. The inherent differences iAuthorsD.M. Borrok, R. B. Wanty, Ridley W. Ian, P. J. Lamothe, B. A. Kimball, P. L. Verplanck, R.L. RunkelCopper isotope fractionation in acid mine drainage
We measured the Cu isotopic composition of primary minerals and stream water affected by acid mine drainage in a mineralized watershed (Colorado, USA). The δ65Cu values (based on 65Cu/63Cu) of enargite (δ65Cu = −0.01 ± 0.10‰; 2σ) and chalcopyrite (δ65Cu = 0.16 ± 0.10‰) are within the range of reported values for terrestrial primary Cu sulfides (−1‰ < δ65Cu < 1‰). These mineral samples show lower δAuthorsB.E. Kimball, R. Mathur, A.C. Dohnalkova, A.J. Wall, R.L. Runkel, S.L. BrantleyThe use of fluoride as a natural tracer in water and the relationship to geological features: Examples from the Animas River Watershed, San Juan Mountains, Silverton, Colorado
Investigations within the Silverton caldera, in southwestern Colorado, used a combination of traditional geological mapping, alteration-assemblage mapping, and aqueous geochemical sampling that showed a relationship between geological and hydrologic features that may be used to better understand the provenance and evolution of the water. Veins containing fluorite, huebnerite, and elevated molybdenAuthorsDana J. Bove, Katherine Walton-Day, Briant A. KimballUnderstanding contaminants associated with mineral deposits
Interdisciplinary studies by the U.S. Geological Survey (USGS) have resulted in substantial progress in understanding the processes that controlthe release of metals and acidic water from inactive mines and mineralized areas,the transport of metals and acidic water to streams, andthe fate and effect of metals and acidity on downstream ecosystems.The potential environmental effects associated withAuthorsPhilip L. VerplanckMetals fate and transport modelling in streams and watersheds: state of the science and USEPA workshop review
Metals pollution in surface waters from point and non-point sources (NPS) is a widespread problem in the United States and worldwide (Lofts et al., 2007; USEPA, 2007). In the western United States, metals associated with acid mine drainage (AMD) from hardrock mines in mountainous areas impact aquatic ecosystems and human health (USEPA, 1997a; Caruso and Ward, 1998; Church et al., 2007). Metals fatAuthorsB.S. Caruso, T.J. Cox, Robert L. Runkel, M.L. Velleux, Kenneth E. Bencala, D. Kirk Nordstrom, P.Y. Julien, B. A. Butler, Charles N. Alpers, A. Marion, Kathleen S. Smith - Web Tools
Historical water-quality and geospatial data related to the Gold King Mine release or collected near the Silverton, Colorado, area can be found at in USGS Professional Paper 1651: Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado (2008). Additional NWIS data from the time of the release are available for downl
Water Quality Portal
The Water Quality Portal integrates and provides access to publicly available water-quality data from databases such as USGS NWIS and BioData, EPA STORET, and USDA-ARS STEWARDS through a single search interface.
Current Streamflow and Water-Quality Monitoring at Select Sites in the Animas and San Juan River Basins, Colorado, New Mexico, and Utah
The USGS monitors current streamflow and water-quality conditions at various sites in the Animas and San Juan River Basins in Colorado, New Mexico, and Utah, including areas below the Gold King Mine release area. These streamgages provide continuous data on streamflow and select water-quality constituents including specific conductance, water temperature, pH, and turbidity.
Hazards Data Distribution System (HDDS) Explorer
The Hazards Data Distribution System (HDDSExplorer) is an event-based interface that provides a single point-of-entry for access to remotely sensed imagery and other geospatial datasets as they become available during a response.
- News
Below are news stories associated with Gold King Mine.