Catalog Search Results
Author
Pub. Date
2006.
Description
This report details the results of a study conducted by University of Colorado researchers for the Coal Creek Watershed Coalition on the source of metals in the Coal Creek watershed during low flow. Coal Creek is the main water supply for the Town of Crested Butte in Gunnison County, Colorado.
Author
Pub. Date
2015.
Description
Dramatic increases in the number of oil and gas extraction wells in Colorado have raised environmental concerns about the potential effects of oil and gas activities, with active debates about the risks of groundwater contamination near the top of the list. Two of the biggest concerns related to potential groundwater contamination are methane gas migration and groundwater contamination by flowback and produced water, either through spills impacting...
Pub. Date
2009.
Description
Discharges of treated produced-water to surface waters are eligible for coverage under this general permit. There are two types of facilities generating these discharges. Exploration and Production (E&P) Waste Management Facilities are generally within an oil gas field; Commercial Disposal Facilities are generally offsite, receives E&P wastes and other types of waste waters.
Author
Pub. Date
2009.
Description
This report details the results of a study conducted by University of Colorado researchers for the Coal Creek Watershed Coalition on the source of metals in the Coal Creek watershed during early spring flow. Coal Creek is the main water supply for the Town of Crested Butte in Gunnison County, Colorado.
Author
Series
Commission policy volume 10-1
Pub. Date
2010.
Description
Direct measurement and characterization of the health and well being of the aquatic community in surface water are critical to determining how effectively Colorado is achieving the ultimate goals of the Colorado Water Quality Control Act ("CWQCA") and the federal Clean Water Act ("CWA"), which are to restore, maintain, protect, and improve the quality of our water resources. These legislative policy statements highlight the importance of having tools...
Pub. Date
2006.
Description
Our drinking water supplies, fishing and recreational waters are fouled by uncontrolled pollution when rainwater and snowmelt wash over city streets, parking lots, and suburban lawns and pick up toxic chemicals, disease-causing organisms (from pet waste), and dirt and trash. This problem is called urban stormwater pollution. Recent studies have found that urban stormwater rivals and in some cases exceeds sewage plants and large factories as a source...
Pub. Date
2011.
Description
Section 303(d) of the federal Clean Water Act (CWA) requires states to identify waters where effluent limitations mandated by Section 301(b)(1)(A) and Section 301(b)(1)(B) are not stringent enough to attain water quality standards. These waters are compiled into the Section 303(d) list of impaired waters. The Colorado Section 303(d) List identifies those water bodies, where there are exceedances of water quality standards. The 2012 Monitoring and...
Author
Pub. Date
2004.
Description
Metal-mining associated wastes in the Lefthand Creek watershed in Boulder County, Colorado have been implicated as a major source of stream water contamination due to acid generation and toxic metal solubility. This watershed hosts hundreds of now inactive mine openings and dozens of sites of former ore milling. No complete analysis of mine sites or their environmental impacts exists to date. This report documents research and analysis of the sources,...
Author
Pub. Date
2006.
Description
This report is intended to be a guidance document for use by the Lake Fork of the Gunnison Watershed Group (LFWG) in prioritizing and planning water quality reclamation projects at Mine sites in Henson Creek above the confluence with the Lake Fork of the Gunnison River. Investigation of the water quality of Henson Creek was initiated as part of the effort to improve the water quality in the Lake Fork of the Gunnison above Lake City. Henson Creek was...
Pub. Date
2012.
Description
Storm water runoff is water from rain or snowmelt that does not immediately infiltrate into the ground, and instead flows through natural or man-made conveyance or storage systems. Stormwater runoff volume is greater in areas with high proportions of impervious surfaces (e.g., paved roads, buildings, parking lots, etc.). Runoff from areas where industrial activities are conducted can contain pollutants when facility practices allow exposure of industrial...
Author
Pub. Date
2009.
Description
The U.S. Environmental Protection Agency (EPA) has requested an evaluation of alternatives for the permanent closure of the Reynolds Adit at the Summitville Mine Superfund Site (SMSS). The Reynolds Adit was driven in the late 1890s through early 1900s. The adit was to dewater the upper workings (thereby facilitating mining) in South Mountain and used to serve as an ore-haulage route for ore produced from these upper workings. During the most recent...
Pub. Date
2009.
Description
ARRA is providing much-needed assistance through the Clean Water State Revolving Fund programs to communities in Colorado. The United States Environmental Protection Agency is working with the Colorado Department of Public Health and Environment Water Quality Division to help Colorado assistance recipients understand and efficiently comply with ARRA requirements.
Pub. Date
2016.
Description
On August 5, 2015, a U.S. Environmental Protection Agency ( EPA) work crew digging into the Gold King Mine (GKM) Level 7 adit near Gladstone, Colorado, triggered a blowout and on going discharge of impounded mine water. The EPA reported that more than 3 million gallons of acidic mine water containing sediment, heavy metals, and other chemicals discharged into Cement Creek, which flows into the Animas River, and into New Mexico where the Animas River...
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