Laserfiche WebLink
~ III IIIIIIIIIIIIIIII <br />P~ABODY <br />~~`~~~~ Peabody Western Coal Company <br />October 13, 1993 <br />Ms. Susan Burgmaier <br />Division of Minerals and Geology ,Q; <br />1313 Sherman Street, Room 215 ' CF=~~~ <br />Denver, CO 80203 ~Q <br />RE: Seneca II-W, C-82-057, NOV No. C-93-134 ~~~~-,~; OCr1 g 199 <br />. ,,., <br />~~,. <br />• ~.~, . <br />Dear Ms. Burgmaier: ~~~, <br />u ~` <br />The attached information is being submitted to comply with Step~9y <br />No. 2 of NOV C-93-134. This step called for a plan to be <br />submitted to minimize erosion and siltation from the haul road. <br />Tab 13, Page 19 of the permit application lists a number of <br />measures that could be used to minimize erosion and siltation <br />from haulage roads. In this particular case, PWCC will employ <br />the use of straw dikes to prevent sedimentation from being <br />discharged onto unpermitted areas. The attached information was <br />taken from the "Handbook of Alternative Sediment Control <br />Methodologies for Mined Lands", March 1985, by the Mining and <br />Reclamation Council of America. According to information <br />submitted in the permit application, discharge from Culvert A-3 <br />as a result of the 10-year, 24-hour precipitation event is 12.68 <br />cfs. This number was based on a conservative curve number of <br />80. Actual runoff is probably somewhat less and thus the <br />installation of straw bales on the downstream end of Culvert A-3 <br />will be conducted to correct the problem. This area will be <br />periodically inspected to ensure the straw bales are acting <br />effectively. If it is determined the bales are not effective, <br />other means will be employed such as silt fence, rock check <br />dams, or sumps. <br />Should you have any questions regarding the above, please <br />contact me. <br />Sincerely, <br />~o~mas ~ wawwwinwright r <br />Senior Engineer <br />bd <br />c: C. McCulloh <br />G. Wendt <br />Peabody West•m Coal Company • 1300 Swnh Yale S~rsef • Flogsfa(f, Mu:ona 86001 • Telephaw (607) 774.5733 • Fa: (607) 773.45% <br />