2003-08-08_REVISION - M1986076 - Laserfiche WebLink

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The existing buildings on the property were moved in April 1999, as documented in the 1999 Revision Site Plan 1 (see attached). In June of 2002, a new tailings pond and dam were excavated at the site that was previously approved for tailings from the projected production for yeazs 2000 and 2001 (Plate 1). Mining has proceeded through the projected production for 1999, so that the 2000 and 2001 reserves have yet to be mined. There is currently no room left at the current tailings pond, until the aforementioned reserves are mined. Work Performed The new tailings pond, dam and pad were surveyed with Brunton and Tape (Plate 1, Figures 1 and 2), in relation to existing features. The existing topographic map was used as a base (see Exhibit E, Mining Plan, 11/13/1994) a Division of Minerals and Geology file. Geological structures were projecied from the mine workings in Adit 2. A soil profile was measured, as was the orientation of underlying bedding-(Figures 2 and 3). A request for release from reclamation and bond for land transfer was submitted on 07/28/03. The southem boundary of the permitted azea was restaked to conform with the southem boundary of the Incas No. 2 and Incas No. 3 patented mining claims (Plate 1 Figure 4). This was done, in order to insure that aeeas outside of the permitted azea would not be affected by runoff. Consequently, the northern boundary of the permitted areas was shifted to the south 77.5 feet, in order for the permitted azea to remain less that 10 acres (Plate 1, Figure 4). The area to be reduced at the northern boundary is .67 acres. Tailings Pond The size and configuration of the tailings pond are shown of Figures 2 and 3. It is proposed to extend the pond and dam an additiona150 feet to the east (see Plate 1). Talus that has sloughed from the overlying hillside will be r~errroved at this time. The containment area consists of 110 cubic yds, designed to hold approximately 220 tons of tailings. The specifications aze in accordance with the design storm event. . The pond was excavated 4 to 8 feet into bedrock. The dam is comprised of cobble to boulder-sized rock fragments, blended with topsoil (see Figure 3). The tailings to be placed in the pond have an initial water content of 20% to 30%. They typically dry within a week. The downslope angle ranges from 33 to 36 degrees. Surface runoff is channeled down the access road and into storm mater diversion structures (see Plate 1, Figure 4). The fetch azea of the runoff slope is less than'/Z acre