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Evaluation of Potential Subsidence Impacts of Longwall Mining in the Spruce Stomp Lease Area <br />to Aquatic Life and Water Supply <br />Potential Project. Stevens Gulch Road (40.10 DR) is an unsealed two -lane country road (U.S. <br />Department of Agriculture, 2000) approximately 30 feet wide. The road crosses West Fork <br />Terror Creek near the upstream end of the Potential Project area. <br />The North Fork Branch of the Union Pacific Railroad serves the mines in the North Fork Valley. <br />The railroad passes through Delta, Hotchkiss, Paonia and Somerset, running alongside the North <br />Fork and Highway 133 near Bowie No. 2 Mine. The railroad remains downgradient of the <br />Potential Project area. <br />4.3.3 Mines <br />For over 100 years, coal mining has been a prevalent land use in the area surrounding the West <br />Fork Terror Creek watershed area. Currently operating mines in the North Fork Valley include <br />the Bowie No. 2 Mine, the Sanborn Creek Mine, and the West Elk Mine. Sanborn Creek and <br />West Elk mines are located to the east of the Bowie Mine area, near Somerset, in Gunnison <br />County. <br />4.3.4 Water Diversion and Storage Facilities <br />Flows in West Fork Terror Creek are manipulated by Overland Ditch and Holy Terror Reservoir <br />diversions and releases. These structures result in a net loss of water from the watershed. <br />Additional reductions of surface water are likely caused by one or more wells. <br />4.3.5 Agriculture (Including Farming, Ranching and Silviculture) <br />The West Fork Terror Creek watershed is used for cattle grazing. Upstream from the Project <br />area, the U.S. Forest Service leases the West Terror grazing allotment to the Campbell & Sons <br />Ranch, which has been in continuous operation since the 1880s. <br />Some timber harvesting has occurred in the Terror Creek watershed, affecting only a very small <br />portion of the watershed (U.S. Department of Agriculture, 2000). Based on the terrain and <br />vegetation present, it appears unlikely that timber harvesting would occur in the vicinity of West <br />Fork Terror Creek in the Potential Project area. <br />121 - 014.000 Wright Water Engineers, Inc. Page 15 <br />January 2013 <br />