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., <br />7 <br />section VII- Decision to Require Revision <br />The following items pertain to various portions of the Colowyo Coal mine permit which <br />need to be revised and/or need to reflect the current status and condition of the site. <br />Colowyo Coal Company L.P. should submit a revision to the permit to address all of the <br />items below no later than June 30, 1995. <br />1. In the permit application, Colowyo states that there aze no pre-mining maps or post <br />minting maps for the northern area of the mine because the disturbance associated <br />with facility construction in this azea have not substantially altered the surface land. <br />Rule 2.05.4(2)(c), under the reclamation plan, states that a plan for backfilling, soil <br />stabilizing, compacting, and grading with postmining contour maps and appropriate <br />cross sections are required. Please submit pre-mining and post-mining maps of the <br />northern area of the mine in accordance with rule 2.05.4(2)(c) and 2.10. <br />2. Please update pages 2.05-14 and 2.02-15 Table 4 titled, Eauioment List. It appears <br />that this table is outdated. <br />3. Colowyo states on page 2.06-15 that augering does not apply to the coal mining <br />operations planned by Colowyo. Page 2.05-31 does state that auger mining is <br />planned at the mine. Please update section 2.06.9 of the permit to include the <br />augering methods used at the Colowyo Coal Mine. <br />4. Page 2.05-22, Colowyo states that, "all ponds, regardless of size, will be examined <br />periodically for structural weakness, erosion and other hazardous conditions." On <br />page 4.05-3 Colowyo also states that "the accumulation of sediment will be monitored <br />periodically." Per Rule 4.05.9(13) ponds should be inspected quarterly, not <br />periodically as noted above. Please revise these statements to make note of quarterly <br />inspections. <br />5. Page 2.06-8, Colowyo states that fills will be inspected periodically. Per Rule <br />4.09.](11), fill should be inspected quarterly by a qualified professional engineer. <br />Please revise this statement to make note of quarterly fill inspections. <br />6. The Division was unable to locate the post-mining drainage designs for Final East <br />Pit ditch, Section 11 ditch, Gulch B ditch, West Pit Ditch and Taylor Creek ditch. <br />Please provide the ditch designs, or direct us to where they are located in the permit. <br />7. The Division was unable to locate the certified as-built designs for the Streeter Pond <br />(001), the Gossard Pond (003) and the Shop Area Pond (002). In review of the <br />permit application, the Streeter Sedimentation Pond was modified in a technical <br />revision approved June 14, 1985. The modification of the pond included construction <br />of a dike into the pond and widening of the embankment. Designs were included for <br />the modification, but a certified as-built design could not be located. It was also <br />