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~ ~ III IIIIIIIIIIIIIIII PEABODY COAL COMPANY ~ ROCKY MOUNTAIN DIVISION 10375 EAST HARVARD AVENUE SUITE 400 DENVER. COLORADO 80331 (3031 3375903 May 14, 1983 Ms. Sandra Emrich Reclamation Specialist Mined Land Reclamation 423 Centennial Building 1313 Sherman Street Denver, Colorado 80203 Dear Sandy: ~~ T;'v ~. ' 19;'..3 This letter is in response to your April 29, 1983 inspection and subsequent report regard- ing our Seneca II Mine. In the problems sections of the report you stated: Submit either a plan to stabilize any gullies greater Than nine inches or the demonstration required by Rule 4.14.6(2) by May 21, 1983. As I am sure you are aware, the reclamation of a mine on steep topography, such as Senecas, presents a number of problems for the reclamation supervisor. One of those problems is the natural creation of rills and gullies. It seems as though every time Roy turns around, another gully shows up. Rills and gullies are inevitable in the spring at the Seneca Mine. The best way to handle stabilization of the problem area is to let the area dry out prior to putting reclamation equipment to work. This serves two purposes: First, if the repair is made while the runoff is still fairly heavy the repaired area would soon fail again and secondly, reclamation equipment on wet ground would cause far more damage than the gully every would. Once the area has dried out, appropriate measures (ie., retopsoiling, revegetating) will be taken to repair the damaged areo. Prevention of gullies is almost impossible in some areas at the mine, such as swales, small drainages and steep slopes, etc. These areas will be channeled to a riprapped main channel to keep erosion to a minimum. I think you will recall that Roy initiated this practice last year and to date has been very successful. (1'~` ~~ ~lls