Inc Tetra Tech
Author
Pub. Date
2014.
Description
This Master Plan is based on general scientific and engineering knowledge of the function of river systems, applied to the Little Thompson Watershed to evaluate post-flood conditions and to develop conceptual recommendations for recovery and restoration of the river. Both qualitative and quantitative information were employed, where available, to develop a thorough understanding of the system, and to support long-and short-term recovery and planning...
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...
Author
Pub. Date
2019.
Description
There are approximately 1,736 known abandoned coal mines in the State of Colorado. In 2017 and 2018, on behalf of the State of Colorado Department of Natural Resources Division of Mining Reclamation Safety (DRMS), Tetra Tech, Inc. inspected 38 coal mine fire sites across Colorado. Site conditions included highly active fires, low activity and dormant fires and sites that were previously reclaimed and confirmed as dormant/extinguished. Several coal...
Pub. Date
2008.
Description
The Colorado Department of Public Health and the Environment (CDPHE) has identified Sanchez Reservoir in Costilla County as not supporting its designated uses due to the presence of elevated fish tissue concentrations of mercury that have resulted in Fish Consumption Advisories. Mercury concentrations at the levels observed present a significant health risk to persons who consume listed fish from the reservoir. Because Sanchez Reservoir does not support...
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