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<br />' ~~ <br />Page Thr January 15, 1980 <br />b. How many acres is the "practical size area" for <br />grass seeding? <br />ANSWER: Seeding and grassing activity shall take place immediately <br />(season permitting) as areas become available and free from mining <br />activity. <br />2. Topsail <br />a. How many inches of topsoil will be replaced on areas <br />not needing fill? <br />ANSWER: Estimated at 6" to 12", <br />b. How many inches of material will be spread on low <br />lying areas? <br />ANSWER: Estimated at 36" to 48". <br />c. The operator needs to contact the U.S. Army Corps <br />of Engineers to determine if a 404 Dredge and Fill <br />Permit is required. The office handling your area <br />is: etc. <br />ANSWER: U.S. Corps of Engineers being contacted in reference to 404 Dredge <br />and fill permit. <br />3. Trees, Shrubs and Grass <br />a. How many feet of ground will be left undisturbed <br />between the river and the mining activity and the <br />canal and the mining activity? <br />ANSWER: Past history of gravel extraction set-back from streams and <br />irrigation canals varies from 50' to 100'; however, these figures may <br />vary according to ground conditions. <br />b. Prior to seeding, the soil should be sampled to <br />determine if any fertilizer is needed. <br />ANSWER: Prior to seeding, soil test shall be taken to determine quantity <br />and mix of fertilizer required. <br />c. What is the proposed grass seed mix and the amounts <br />to be planted? <br />ANSWER: Colorado State University recommended a mixture of: (1) Jose <br />Tall Wheat Grass - 10 PLS/Acre (2) Birdsfoot Treefoil - <br />