Filters: Tags: Barren/rock (X)
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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. 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...
The Kanab Creek Project Area encompasses 130,000 acres in southern Utah. This project area receives National attention because it is home to the Paunsagunt mule deer herd which are prized by trophy hunters, and because it supports the southernmost population of greater sage grouse within the western United States. One of the focuses of this project area has been to conduct treatments that cross jurisdictional boundaries, by working closely with private landowners, Natural Resource Conservation Service (NRCS) and Utah’s Watershed Restoration Initiative, to provide landscape-level benefits for sage grouse. Telemetry data show that sage grouse are actively using older treatment areas, and newer treatments will expand...
Categories: Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Arid/desert,
Bank stabilization/erosion control,
Barren/rock,
Bureau of Land Management,
Debris addition,
Background information.—The Powell River watershed has a long history of coal mining. Prior to August 3, 1977, Virginia laws and regulations required the reclamation of areas affected by coal surface mining, but there were no regulations addressing reclamation of underground mines. Flows or seeps from these abandoned mines have long degraded the waters of the Powell River watershed (U.S. Department of Agriculture, 2008). Water that is discharged from these sites can be highly acidic and it commonly contains high concentrations of dissolved iron and aluminum sulfates. This acid mine drainage degrades the water quality of streams and water supplies and is a major contributor to aquatic habitat degradation. Led by...
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