2004-06-14_REVISION - M1998052 - Laserfiche WebLink

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h KUrl : hHX NU. ylb4b411a1 Jun. 14 ~kx14 bb: 21#1M N4 We committed to locating potential permanent fuel storage above the t r)t7- ar flrxsd flow. Alpine Rock's calculations irrdicated that the 100-year fl flow would be 3.26-feet above the normal flow. Normal slow is defined as base flow, which is the flow during times other than spring runoff pr predpttatlon events. AS an added margin of safety, we will beats all permanent fuel storage at (east 32fi-f!?et atxrvr~, the plevatron of the nnrmaUOrdinary high water mark on the dream bank, perpendicular from the stream to the fuel storage lor~on. Such pemlartent storage tanks would be hermed 2nd lined with a UV resistant membrane and the capacity of the containment area will be sized to accommodate 1.5 times the capacrly of the tanks. Other materials, such as lubricants, and antifreeze, would, rf stored on site, also he Int~tecl inside the containment area Also, as required, we would appropriately sign the area stating that the fuel valve is to be manned at all times during fueling. - Altematrvely, we reserve the right to servicx the fuel needs of the site with a fuel tanker, or other mobile tank, both of which would bo parked only temporariry on site, and therefore not contained. ~. waters of me United Scares One of the things you speafically looked at during your inspecton of the site on June t, 7004 wtts whether or not wetlands exist m the proposed area of affected land. You did look at this, and, as disgJSSed in your Inspection Report, determined that, indeed, no weNand~ cxi~t within the 42- acres to be mined, and that therefore you see rto need to require a wetlands delineation of the project- We still realize that it will be necessary to contact the Corps of Engineers with regard Yo the Insfallatlon of cuh~ertjs) to radlna~ another Aceow Road to the site. 4. Fugitive Dust We will investigate the speaf~c air permtt requlremerris for this operatlon and will contact the APCD as necessary. 5. Redemation Costs We will reclaim the site in two stages. The total mine~i area is approximately 42 acres and we will reclaim the first half of the site (21 acresl when we are approximately one-half done, and reclaim the remaining 21 acres when we are completely done. The average height and maximum length of the "forward° workiing faces at any tlme throughout the operation are estimated to be 3U-feet tall and 600 feet long. The average height and maximum IenglFr of side working faces are estimated to be 10-feet tall and 2,600-ft:ct long. The time required 3