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E.ahibil E CMLRB 112 Permit Application <br />Agile Sfane Systems. Inc. <br />• will be tested first to ensure suitability as a plant growth medium. Test plots will be <br />developed in the granite areas as soon as quarry development has progressed to a point <br />where permanent test plots can be located. Test results from such a test program will be <br />provided to the Department of Fish and Wildlife for review and recommendations. If <br />suitable, such mixtures will be developed for use in the quarry azea. <br />The proposed post-mining bench plan includes several alternatives to create wildlife <br />habitat and improve the "straight-line" bench chazacteristic of open pit mining. <br />1) About ]0% of the final highwalls along all benches, high and low, will have 45 <br />degree "talus slopes". <br />2) About 33% of the highwalls aze at higher elevations in the northeast corner of the <br />mining property. These highwalls aze expected to have reduced bench widths and <br />0.25:1 sloped highwalls to blend into the adjacent non-mined land steeper <br />topography. <br />3) About 25% of the remaining highwall bench areas will be reclamed with topsail <br />and/or mixture and reseeded. <br />4) The remaining 22% of the highwalUbench areas will not be reclaimed. <br />The post-mining highwall slope stability of the highwall features is within reasonable and <br />conservative engineering limits for long term safety. Several rock samples were tested in <br />confined and unconfined tests at the Colorado School of Mines and evaluated by Azurite, <br />Inc. for stability. (See the Geotechnical Stability Analysis for supporting test results and <br />• documentation of the highwall bench proposal.) <br />Floors <br />The remaining 43-50 acres of the granite quarry will be bottom cut floor. Current <br />vegetation exists over about 25 - 33% of the pre-mined quarry areas. The quarry floors <br />will be exposed rock grading 2-3% away from the bottom quarry face to enable free <br />draining of any rainfall during production. The quarry floors will remain graded slightly <br />towazds the south where the storm water berm and pond will remain to collect any runoff. <br />An estimated +35% of the quarry floors will be reclaimed to the extent possible based on <br />the availability of top soil and fines and the success of the topsoil admixture. The quarry <br />floors will be covered with a minimum of 12 inches of topsoil or admixture. Straw <br />mulch may be incorporated into the top 4" of the planting medium to enhance moisture <br />retention. Such straw mixes will be tested. After placement of the available topsoil and <br />admixture, the azea will be seeded, fertilized and mulched. See DOW letter at the end of <br />exhibit regazding applicant's commitment to revegetating the quarry area, granite <br />benches. <br />Crossings <br />The reinforced concrete used in the 2 pilings of each crossing across the Tallahassee <br />Creek will be removed, broken and buried in gravel azea IB. <br />Sandstone Quarry <br />. At the end of mining, the sandstone quarry's access ramps and loading areas will be <br />