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fss c ~ <br />MAP Surveys, Inc.'' <br />MAPPING -PLANNING -SURVEYING <br />P.O. BOX 290 • MESA, CO 81643 • (970) 268-5851 • FAX: (970) 268-5256 <br />June 9, 2006 <br />ReCBived <br />Mr. Steve S. Shuey <br />Colorado Division of Minerals and Geology <br />101 S. 3rd Street -Suite 301 <br />Grand Junction, CO 8~ / <br />REF: Upland Gravel, Permit No. M-2001-088 <br />Application for conversion to 112c (CN-01) <br />Response to Second Adequacy Review <br />JUN 1 2 2006 '~~ <br />Orgnd Junctlon Field Office <br />®ivislon of Minerals & Geology <br />REMAINING ADEQUACY REVIEW ISSUES: <br />Exhibit C -Pre-mining and Mining Plan Maps <br />5. Both retention basins will release the storm water from a 10 year event within the <br />prescribed 40 hour time frame by percolation. <br />Exhibit D -Mining Plan <br />8. Please enlarge the processing area to approximately 3.0 acres which includes <br />Units 1 & 2 and the west 0.5 acres of Unit 3. <br />9. The topsoil and overburden stockpile stabilization seed mix will be the same as the <br />permanent seed mix. <br />Exhibit E -Reclamation Plan <br />13. The existing pit floor contains two basins which will retain storm water. The two <br />basins consist of the active mining area and the processing area. A ten year storm <br />event shall deposit 14,500 cubic feet of water into the extraction pit and 4,750 <br />cubic feet of water into the processing area basin. <br />The volume of water shall reach the depth of 2.5 feet in the extraction pit based on <br />the contours shown. Contours of the extraction pit will change during the Mining <br />process. The ten year event volume of water contained in the processing area will <br />only reach the depth of 1.0 feet. A 2 foot deep retention pond will be more than <br />adequate, however, the surveyed contours indicate that a 3.3 foot deep pond <br />actually exists between bottom of elevation of 4812.8 and spillway elevation of <br />4816.15 at the pit entry. <br />14. The seed bed shall be fertilized with nitrogen @ 18 Lbs/acre and phosphorus <br />46 Lbs/acre then mixed by contour cultivating four to six inches deep with a disk. <br />The seed will be broadcast at 23 lbs. of pure live seed per acre and covered with <br />topsoil 1/2 to 1 inch deep with a harrow and/or drag bar. Weed free grass hay <br />mulch will then be broadcast at the rate of 1 to 2 Ton per acre. The hay mulch will <br />be crimped to the top soil by sheeps foot roller or crimping disk, <br />