2010-04-20_REVISION - M1977300 (3)

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Environmental Protection Plan, Schwartzwalder Mine 2-1 0 2. MAPS The EPP is required to identify the locations where designated chemicals or toxic or acid-forming materials will exist within the permit area. The locations are to be shown in accurate relationship to topography and other project facilities within the permit areas. Because most of the Schwartzwalder Mine facilities have already been removed, and no toxic chemicals are being stored or used on site, the maps provided in this section show the locations of former mine facilities. (a) General Location and Access The location of the Schwartzwalder Mine is shown in Figure 2-1. The mine occupies 57 acres in the southeast quarter of Section 25, T2S, R71W. Cotter also owns an additional 501 acres (558 acres total) in Section 25. The northeast corner of Section 25, along with adjacent sections to the north, northeast, and northwest, are rural residential properties associated with Blue Mountain Estates. The section west of the mine property is used for summer cattle grazing. The property south and east of the mine is White Ranch Park, owned by Jefferson County Open Space Parks. The site can be accessed from Colorado State Highway 93. From Highway 93, driving north from Golden, turn left onto either Pine Ridge Road or West 56th Avenue. Where these roads intersect (one mile west of highway 93) a paved road enters the private property of 19 exclusive 35-acre home sites called Bear Tooth Ranch. North of Bear Tooth Ranch, the access road becomes bladed dirt, enters Ralston Canyon, and turns northwest toward the mine. Approximately one-half mile of land along the road near Ralston Reservoir is • owned by the Denver Water Board, and the next two miles of land are owned by Jefferson County Open Space Parks. The road then enters the mine property through a gate on the eastern boundary of mine property. (b) Locations of Chemicals and Facilities Figure 2-2 shows the locations of mine facilities, including reclaimed waste rock dumps, former buildings that have been removed during reclamation, and the mine portal which has been plugged and sealed. No designated chemicals or acid-forming materials will be used, stored, handled, or disposed of within the permit area. The mine is not, nor is it expected to become, acid-generating. The flooded mine workings and alluvium/fill have been identified by DRMS as containing "toxic-forming materials" on the basis of (1) uranium, radium-226, and molybdenum in groundwater in the underground mine pool and (2) uranium and molybdenum in groundwater in the alluvium and fill. The location of the underground workings is shown in Figure 2-1 and Figure 2-2. The extent of the saturated alluvium and fill is shown in Figure 8-20. The results of a gamma survey of the site, performed in 2008, are shown in Figure 2-3. The water treatment plant and the pumphouse for the domestic well are the only remaining buildings on the mine site. All other facilities have been removed. Electrical lines and the access road service the water treatment plant and the domestic well. The sumps and a portion of the collection trenches that were installed in the alluvium to capture alluvial groundwater and route it to the water treatment plant during operations are still in existence, as shown on Figure 2-2. No chemicals are currently stored at the water treatment plant, with the exception of one resin column 2, and no other chemical storage facilities exist on site. 2 Dow 21K anion exchange resin for separation of uranium from water 4109C.100419 Whetstone Associates