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.. J May 10, 1978 ~MM C. C. McCall, Administrator Mr. Tommy Raye Camp Dresser & McKee, Inc. 11455 West 48th Avenue Wheat Ridge, Colorado 80033 RE: Rockcastle Company, Grassy Creek Coal Co. Mine No. 1; Routt County Our File ~~ 78-45 Dear Mr. Raye: I want to thank you once again for taking the time to come down to our office to discuss the current status of Rockcastle's application. As we discussed at our meeting yesterday, the application is basically quite well-prepared, but there are several questions and comments you will be required to address before the application can be considered by the Mined Land Reclamation Board. The points are as follows: 1) Approval from Routt County has not yet been received. 2) You must submit proof of publication and proof of notification by certified mail to the surface and adjacent landowners. 3) Mining plan - Although your map and timetable are well-coordinated you need to explain the sequence of operations in the narrative as well, referencing the map and timetable whenever pertinent. You should also give a more specific description of the entire mining process, starting with a discussion of what surface facilities will be constructed and utilized during the life of the mine, stating the average depth of topsoil to be removed (or specifying that you will remove the entire "A Horizon" or all available topsoil as described in the Soils Exhibit), outlining the sequence of mining operations at each of thr four sites, explaining how the coal will be handled and transported, and finally, discussing in more detail your plans for diversion ditches and sediment ponds to prevent disturbance to the hydrologic balance of the area. If you can outline specific plans for the location and construction of the diversion ditches and sediment ponds, I would urge you to include them in both the ldcoot' dt ElariA.itlaeion and on hho maps. You ~hduld also Bi~ed~/ the measures you will be caking to abate duet pollution generated by the operation. Your plan also does not discuss how many seams of coal will be mined at each site or how deep the overburden and interburden layers are. Along with that information, we need to know the thickness of each seam and the variation in thickness of overburden at each site. STATE OF COLORADO RiC HARD Gov ern of 'll ,I"1~11~~~~~ ~~~ DEPARTMENT OF NATURAL RESOURCES g99 Harris D. Sherman. Executive Director MINED LAND RECLAMATION 723 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tet. (303) 8393567