UWP participates in remediation projects at legacy mine sites in the Upper Uncompahgre Watershed to address metals loading and acidic mine drainage to streams that do not meet beneficial uses for aquatic life, recreation, water supply and/or agriculture. Consequently they are on EPA’s Clean Water Act’s 303(d) list of impaired waters. Loading from abandoned mines and natural processes results in overall poor water quality in the Upper Uncompahgre Watershed (headwaters to Ridgway Reservoir).
Current Projects
Governor Basin Project Planning
In the summer of 2018, UWP continued discussions with the Division of Reclamation, Mining and Safety (DRMS) and Ouray Silver Mines, Inc. (OSMI) about how to use Natural Resource Damages (NRD) Funds from the Idarado Mine consent decree for a restoration project in our watershed. Based on water quality and environmental conditions, conceptual project designs, and potential funding sources, our nonprofit partnered with DRMS and OSMI to develop a plan for a restoration project in Governor Basin, where waste rock and tailings from the Terrible and Virginius mines leach metals that impair water quality, down-gradient aquatic and terrestrial habitat, and watershed health.
The goal of the project, approved for NRD funding in 2020, is to collaborate to restore alpine, riparian and aquatic habitat, and improve water quality in Governor, Sneffels and Canyon creeks. UWP spent 2021 crossing all our t’s and dotting all our i’s with project partners including Trout Unlimited. In September, our staff and volunteers collected seeds in Governor Basin for use in future vegetation efforts in the project.
In mid-2022, Ouray Silver Mines, Inc. went into receivership so plans for the project were halted. In 2023, the EPA took over the main implementation of the project with UWP and TU providing assistance including revegetation and monitoring. In 2024, Thorin Resources bought the Revenue-Virginius Mines and related mine properties. Thorin already owned Campbird Mine. In 2025, Thorin and the EPA reached agreement about doing the project, but the U.S. Department of Justice did not provide permission for work on the U.S. Forest Service land within the project area.
In June 2026, the Department of Justice and Thorin signed documents that allowed the project to move forward. Project implementation by the EPA and Thorin began on July 13. You can see related documents on the EPA website Governor Basin page. The U.S. Forest Service documents about the project implementation are available. Road and trail closures in the Governor Basin are from July 13 to 25, 2026; and then again from August 3 through November 30, 2026 unless rescinded sooner.
UWP is working with the EPA, Thorin and Trout Unlimited to create a revegetation plan, with work occurring in late summer and fall 2026 and late spring and summer 2027. Ashley Bembenek, UWP’s Technical Advisor and Alpine Environmental Consultants owner, is UWP’s lead scientist on the project.
Idarado Consent Decree
While UWP is not engaged in restoration or mine site remediation within the Idarado Consent Decree area, UWP is active in communications and research with Newmont and the Colorado Department of Public Health & Environment, with the aim of spurring more water quality improvement in the Red Mountain Creek drainage. UWP organized community meetings in Ouray in May 2018 and April 2026 to provide updates about the progress in reaching the remediation goals of a reduction in zinc in Red Mountain Creek by 50%. Since the decree was signed by Newmont and the State of Colorado in 1992, zinc has been reduced by 25%. The creek and downstream waters remain highly mineralized and acidic.
In summer 2026, UWP began a partnership with Western Colorado University, the Western Alliance for Reclamation Management, and Americorps, where a WCU Masters in Environmental Management student is creating an information archive, fact sheets, and presentation about the Idarado Consent Decree. The goal of this project is to provide information resources for the community, decisionmakers, and future UWP staff and board, so they can better understand the history, science, and legal/regulatory framework of the decree and water quality improvement efforts in the Red Mountain Creek area of the Upper Uncompahgre River Watershed.
The project is being implemented by Fran Nesler, a second-year graduate student in the Environmental Management Program at Western Colorado University. Before coming to WCU, Fran worked as a hydrologist for the Shasta-Trinity National Forest in northern California after graduating from University-Wisconsin Milwaukee with a bachelor’s in environmental engineering. In their spare time they love to spend time outside by running, biking or hanging by the river.
Rocky Mountain Mining & Reclamation Conference
UWP participates in the organizing committee of the Rocky Mountain Mining & Reclamation Conference with the aim of fostering relationships and innovation that lead to water quality solutions on active and legacy mine sites in our watershed. For more information about the biannual conference go to rmmrc.org.
You can learn about mine site remediation in the watershed from this 2023 presentation.
Completed Projects
Atlas Mill Project Planning
In early 2018, Ouray Silver Mines, Inc. (OSMI) asked UWP if we would partner on a proposed project remediating and stabilizing the Atlas Mill and tailings pile up County Road 361 above Ouray. This multi-stakeholder project aims to improve water quality in Sneffels Creek downstream of the Atlas Mill. While UWP completed a similar bank stabilization project in this area in 2017, the new project led by Trout Unlimited aims to extend the bank stabilization to further restore the area and improve water quality by reducing heavy metal drainage into the creek. UWP organized a community meeting in Ouray in July to share the project proposal and get public feedback. The response was positive, and the project was approved by the Colorado Department of Public Health and Environment. The $350,000 project was funded partially through the Supplemental Environmental Project (SEP) program with a financial penalty paid by OSMI for a water quality violation at the Revenue-Virginius Mine, made by the mine’s previous owners. Nearly half of the remaining project funding will be donated by OSMI.
In 2019, Trout Unlimited (TU) took the lead on the Atlas Mill Tailings Remediation, working with OSMI on approximately eight acres with 4.7 acres of contamination present in the form of legacy waste rock and tailings. With UWP only supporting planning efforts as needed, project partners included the USFS and EPA.
A Good Samaritan Administrative Order on Consent (AOC) was needed as the legal binding approval document between TU (Good Sam) and the USFS. The process to develop the AOC took over eight months and is now a good template for UWP and others to work on future projects in the watershed. John Reams Construction, out of Naturita, was the selected contractor that worked at the site with TU to install three drainage controls with drainage fans along the top and bottom sections of the consolidated tailings and waste piles, streambank stabilization and waste removal along Sneffels Creek, as well as revegetation through grading, consolidation, and amending of contaminated waste rock and tailings. The work was completed in fall 2020, a final report was issued in December 2020, and the site is being monitored for results.
2017 Non-Point Source Grant Projects
UWP’s remediation projects at three legacy mine sites in the Upper Uncompahgre Watershed addressed metals loading and acidic mine drainage to streams that do not meet beneficial uses for aquatic life, recreation, water supply or agriculture.
The first site to be remediated was the Michael Breen Mine, where the polluted drainage from a collapsed mine entrance was flowing from the mine across Engineer Pass Road and into the Uncompahgre River. This high alpine portion of the river was found to contain toxic levels of cadmium, copper, zinc and manganese, which impair aquatic life. UWP constructed a diversion ditch to reroute the mine discharge and reduce leaching of metals into the river in October 2014. Re-routing the water also eliminated pooling under the load-out structure, stopping destabilization of the structure. Later, a one-acre area adjacent to the diversion ditch and former drainage area was re-vegetated with a mix of native seeds, and anchored by an early ground cover species, a soil amendment and aspen mulch. Chris Peltz of Silverton-based Research Services LLC assisted with the design of re-vegetation prescriptions and installation.
The second completed remediation project was at Vernon Mine, where two draining mine entrances were leaching significant amounts of copper into Gray Copper Gulch. Besides the copper levels, this stream has been identified as having poor water quality due to iron and a low pH, which impair aquatic life. Next, construction crews removed approximately 1,000 cubic yards of waste rock from the Gray Copper Gulch valley floor, and hauled it uphill to a repository in a flat area away from hillslope runoff and drainage areas. Two mine entrances were closed off and a small diversion ditch was constructed to redirect drainage from one entrance. Strategic portions of the area were also revegetated with a high alpine mix, soil amendments and aspen mulch.
The third project is at Atlas Mill, an abandoned mill off Camp Bird Road above Sneffels Creek. Mine tailings from legacy operations have been deposited in the creek’s floodplain, and erosion of the tailings and runoff during spring snowmelt contribute heavy metals, especially cadmium and zinc, to the stream, impairing aquatic life. UWP collaborated with the operators of Ouray Silver Mine, Inc., which is the property owner of areas within the project, and consulting with Western Stream Works LLC on project design to minimize erosion of tailings in the floodplain.
