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Folders: ROOT > ScienceBase Catalog > Economic Impacts of Ecosystem Restoration > California Gulch NRDAR Restoration ( Show direct descendants )
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ROOT _ScienceBase Catalog __Economic Impacts of Ecosystem Restoration ___California Gulch NRDAR Restoration Filters
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Background information. The original Canterbury Tunnel began as an idea in 1922 as a way to remove excess water in the mines that honeycomb the mountains near Leadville, Colorado. The objective of reducing the volume of water in these mines was to increase the opportunity for ore extraction. The project’s original plans were never fully realized because of technological limitations and increasingly dangerous conditions that confronted workers, and so the 4,000-foot-long Canterbury Tunnel sat dormant until the early 1960s. Historically, Leadville relied on the nearby Big Evans Reservoir as the primary source of municipal water. The reservoir’s elevation of 10,200 feet above sea level has been particularly problematic...
Background information. Settlement funds from the California Gulch Superfund site have been used to improve instream aquatic habitat and increase brown trout (Salmo trutta) populations in the Arkansas River. The upper Arkansas River Basin is a high-elevation mountain river that supports trout populations. Historically characterized by a relatively narrow channel with fast moving water, recent degradation of the upper Arkansas River due to historic land-use practices have contributed to an altered river channel and a decrease in important habitat features for trout, such as deep-water pools. This restoration project was designed to address three major issues: bank erosion, altered river channel morphology, and degraded...
Categories: Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Amphibians,
Aquatic,
Bank stabilization/erosion control,
Colorado,
Colorado Mountain College,
Background information. The Dinero Tunnel, which extends approximately 3,000 feet from the surface to the Dinero Shaft, was used in the late 1800s to mine primarily for silver. In more recent years, the tunnel, located approximately five miles west of Leadville, Colorado, began to discharge acid mine drainage into Sugarloaf Gulch, a tributary to the Lake Fork River which ultimately drains into the upper Arkansas River. Consequently, acid mine drainage from the Dinero Tunnel has significantly affected downstream waters, including a wet meadow and beaver pond complex. Occasionally, the Dinero Tunnel experienced blowouts that developed when temporary pressure would build up behind a blockage in the tunnel, which would...
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