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.. <br />Mr. Lee Tucker <br />January 28, 1980 <br />Page -2- <br />2. The pre-mining map does not contain an outline of the affected <br />area nor any informaY.ion concerning the vegetation, of the area, as <br />required by Rule 2.12(3)(e). <br />3. The mining plan should also clearly indicate the outline of the <br />affected land. <br />Exhibit D - Plinin Plan: <br />1. Please estimate the total volume of topsoil and overburden to <br />be stripped and stockpiled for later replacement for reclamation. <br />Please clarify exhibit E, and clearly indicate whether or not you <br />plan to salvage all of the available topsoil. <br />2,. The estimated thickness of topsoil and overburden (0 to 18") <br />appears to be incorrect unless the distribution is very erratic. <br />The average depth of overburden as .determined from the test pit <br />results is 2.87 feet. <br />3. What are the dimensions of the diversion dam, sediment pond <br />dam and diversion ditch? Where will the materials be obtained <br />for the construction of the dams? If the dam is large enough, it <br />will require approval by the State Engineer's office, in accordance <br />with 37-87-105 C,R.S. <br />4. The table indicating disturbance categories of the affected <br />acreage indicates that no area will have "major disturbances." <br />This is not in accordance with MLR rule (2:12(4)(d)(1) which <br />defines "major disturbance" as: "that area of a mining operation <br />which includes excavations, overburden spoils, and topsoil stock- <br />piles." <br />Exhibit E - Reclamation Plan <br />1, Please specify the maximum slopes to be left on the site. A <br />slope can be no steeper than 2:1 fora dry pit. (See Rule 6.l(f)). <br />2. Approximately how many inches of topsoil and overburden will <br />be replaced during reclamation? <br />3. Depending on the design, the perimeter of the settling pond may <br />need to be seeded and mulched to stabilize the slopes and minimize <br />erosion problems, <br />4. We recommend that areas which have been compacted, such as haul <br />roads, plant sites and scale sites, etc., should be ripped to a depth <br />of 6 to 8" before preparing the seed bed and seeding. <br />5. We recommend that after replacing topsoil on the slopes, the areas <br />should be disced to form and bond between the topsoil and the pit <br />material. <br />6. 41e recommend that broad cast seeding should only be done where it <br />is not possible to use a seed drill. <br />