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.~. <br />• <br />Mr. Robert G. Lucas <br />2. What is the nature of the <br />stratum is solid bedrock, <br />the pit to a total depth <br />2 feet. This will insure <br />species. Please respond. <br />-2- <br />October 30, 1986 <br />stratum beneath the mined material? If the <br />then the operator should plan on backfilling <br />of unconsolidated material of at least <br />adequate rooting depth for planted and native <br />What is the estimated life of both the existing and proposed pits? <br />Pursuant to Rule 6.1(c), "all backfilling and grading shall be <br />completed as soon as feasible after the mining process." If the <br />operator intends to keep the site active for longer than five years, he <br />should consider a plan of concurrent reclamation for mined-out areas. <br />Please respond accordingly. <br />4. Does the operator intend on mining the pit edges to final 3:1 slopes, <br />or will the pit walls be backfilled to this configuration upon <br />completion of mining? <br />Exhibit E - Reclamation Plan <br />1. The operator states that "soil overburden will be placed over the <br />disturbed areas to a minimum depth of six inches." However, the Soil <br />Conversation Service recommends that "During mining operations 10 to 12 <br />inches of topsoil should be stockpiled for later use in revegetation <br />measures." The operator should plan to salvage and replace all <br />available topsoil at the site, which appears to be 10 to 12 inches <br />total depth. Furthermore, the staff has been informed that Moffatt <br />County rangelands frequently experience windy conditions. The staff <br />recommends that topsoil stockpiles be placed in elongate piles which <br />are parallel to the prevailing wind direction in order to minimize wind <br />erosion. Please respond accordingly. <br />2. Will overburden (non-topsoil) be replaced in the pit? If so, to what <br />approximate thickness will it be replaced? <br />3. The Soil Conservation Service recommends that "seeding should be <br />protected from livestock, vehicles, etc. until the plants are well <br />established. "Please describe the appropriate measures that the <br />operator will take to provide this protection. <br />/i ml <br />Doc. No. 4908E <br />