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Mr. Oswald/M -1982- 090 /TR -04 <br />September 10, 2012 <br />Page 6 of 6 <br />DRMS: Please provide more construction details of the proposed snow shed that will connect <br />the covered portal to the equipment storage building, such as dimensions, materials, and <br />footers. <br />CBCI: The snow shed connecting the portal to the storage building will be approximately 128 feet <br />long, 10 feet wide, and average 9.5 feet high. To conform with MSHA fire safety regulations it will <br />have a welded frame using 2" steel pipe (schedule 40) that will either be galvanized, stainless, or <br />painted to prevent corrosion. The welded pipe frame will be suspended between posts (4 ", schedule <br />80, steel pipe) that are placed every 10 feet. Rather than having long footers that span the length of <br />the shed on both sides, 10" wide cylindrical pylons will be poured at or below the frost level (40 ") <br />beneath each post. Each post will have a square 6" wide, 1/4" thick steel plate welded on the bottom <br />that will be fastened to the pylon with four, 3/8" galvanized concrete anchor bolts. Sheeting and <br />roofing materials will be galvanized corrugated steel panels that are bolted to the frame. The <br />integrity of the frame and sheeting will be designed to conform with Ouray County building codes <br />which require a shear strength that can accommodate a 90 mile per hour wind load, and a minimum <br />roof snow load capacity of 106 pounds per square foot. <br />Based on the above responses and enclosures with this letter, CBCI believes that it has addressed all <br />of the issues and questions brought up in the adequacy review letter dated August 30, 2012. Please <br />contact me as soon as possible if you have any other questions. <br />Mike Thompson <br />Principal/Reardon Steel LLC <br />Enclosures: Figure 1: Camp Bird Mine 14L Surface Map <br />Figure 2: Current Topographic Setting & Modeled Contours of Future Excavation <br />Figure 3: Profile A and B <br />Figure 4: Profile C and Pipe Trench Detail <br />Figure 5: 36" CMP Pond Outfall and Overflow Cap Detail <br />ADS N -12 Low Head Pipe Specifications (2 pages) <br />Sheet S 1: Pipe Support Bridge Plan and Elevation <br />Sheet S2: Pipe Support Bridge Details <br />Abbreviation List for Sheets S1 and S2 <br />Ec: Scott Butters, President of Camp Bird Colorado, Inc. <br />John Bryan, CEO of Caldera Mineral Resources, LLC <br />