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COR-040000 Stormwater Management Plan <br />2. DESCRIPTION OF MINING ACTIVITIES (COR-040000, §I.B.1) <br />This SWMP covers industrial activities associated with the Van 4 Shaft mine. <br />The project area is located within Montrose County, Colorado (Figure 1). The location of the <br />site is as follows (Figure 2): <br />Section 29, T46N, R17W <br />The Van 4 Mine is located on Monogram Mesa located east of the Colorado-Utah state line in <br />the southwest corner of Montrose County. The shaft is located approximately 10 miles <br />directionally west of Naturita, Colorado adjacent to County Road DD19. <br />Surface activity and disturbance is shown on the site map (Figure 3). Surface disturbance at the <br />mine will be limited to the development rock area, vent hole shafts, and their access roads. <br />Surface facilities are located near the mine shaft, and consist of the hoist house and shop. There <br />will be no processing activities at the mine site. The ore will be transported to the White Mesa <br />Mill located near Blanding, Utah for processing. Surface vent holes for the active mine are <br />located throughout the project area. The locations of these can be found on Figure 2. A typical <br />drawing of a surface vent hole can be found as Figure 4. Generally, these have been naturally <br />vegetated with native species from surrounding plant communities. <br />• The possible features that may be at each location include: <br />• Development Rock Areas (DRAB) <br />• Stockpile areas <br />• Topsoil stockpile areas <br />• Surface drainage and control structures <br />• Fuel and oil storage areas <br />• Maintenance shop and warehouse <br />• Designated parking areas and storage yards <br />• Mine access roads and pads <br />• Temporary emergency generator <br />• Air compressor stations <br />• Septic system <br />• Solid waste storage (trash, scrap metal, batteries) <br />• Propane heating system <br />Specific features for the facility are shown on the individual site map (Figure 3). <br />A <br />Van 4 Shaft SWMP <br />2 <br />Denison Mines (USA) Corp.