2012-12-20_REVISION - M1977215 (4)

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December 17, 2012 Mr. Bob Oswald Colorado Department of Natural Durango Field Office 691 CR 233, Suite A -2 Durango, Colorado 81303 : RIO GRANDE SILVER, INC. RECEIVED DEC 2 4 2012 Division of Reclamation, & cafe Resources Mining tY RE: BulldoctMine Permit No. M- 1977 -215 Technical Revision TR -21, Mixer warming Shed and Revised parking Area Dear Mr. Oswald: VECEIVE DEC 2 0 2012 ✓ DURANGO FIELD OFFICE DIVISION OF RECLAMATION, MINING AND SAFETY Rio Grande Silver (RGS) is proposing to construct a new warming shed for the Normet mixer on patented mining property adjacent to the existing Batch Plant Building. The project will consist of a series of steel sets on 4' centers covered with Sheet metal. The structure will rest on an existing foundation and be insulated with concrete blankets (see attached plans for details- Figure 1 sheets 1 thru 3). The purpose of the building is to pre -warm the mixer to help ensure consistent shotcrete temperatures. The second item we want to address is the addition of a small parking area on Forest Service property adjacent to the mine site that is Tess than .5 acres in size (See attached plan - Figure 2). We intend to place a fence around the perimeter of the parking area to ensure that access to the PPE area of the Mine remains consistent with current controls. The addition of these features will not result in any increase in employees to the project. EXISTING CONDITIONS The proposed location for these improvements is in the SW 1 /4, Section 25, T42N, R1W, NMPM, Mineral County. The Warming Shed will be located within the existing permit area as described in Permit No. M- 1977 -215 and on a slab already existing adjacent to the Batch Plant Building. The land where the parking lot will be located appears to have been previously disturbed by past `Homestake' mining operations and used for the same purpose. The proposed parking addition is located on US Forest Service managed land. (See Figure 2) PROPOSED ACTION RGS proposes a new Warming Shed structure to be located immediately West of the existing Batch Plant at the Bulldog project site. The proposed action will include the following facilities: 1 112 East 12` Street P.O. Box 610 Creede CO 81130 719 - 658 -1080 Fax. 719-658-1082