Laserfiche WebLink
E~~q <br />coa/cvtnaa~r Seneca Coal Company <br />August 20, 2003 <br />Mr. Daniel T. Mathews <br />Division of Minerals and Geology <br />101 South 3~, Ste 301 RECEIVED <br />Grand Junction, CO 81501 <br />(970) 242-5025 AUG 1 i 1003 <br />RE: Seneca II-W Mine, Permit C-82-057, MR-54 <br />Response to Adequary Concerns Division of Minerals and Geology <br />Mr. Mathews: <br />Enclosed please find two (2) copies of responses to your letter of August 11, 2003 for MR-54 [o the <br />Seneca II-W Mine Permit C-82-057. A required third copy has been sent to you and addressed to the <br />Division Offices at 1313 Sherman Street, Denver, CO. <br />Adeguary Item 1 reguerted 'iediment control details and documentation to demonrtrate that the drainage from the <br />drill titer will meet the went limitationr of 4.05.2, both during drilling and following reclamation." The <br />rerparae rubmitta/ included adequate derign information and documentation to demanrtrate romp/iance with <br />applicable went limits during the operational phare. No rpetifrc documentation war provided to demanrtrate <br />that applicah/e ~uen< lirmitr (eg., nett/eable rolidr limit of 0.5 ml/If would be met upon reclamation grading and <br />toproiling of the rifer, bared on roil roughening treatmenk and/or tilt fencing. <br />Please provide appropriate sediment modeling to demonstrate that the O.SmI/1 settleable <br />solids /unit will be achieved for the reclaimed drill pad sites. <br />Response: A SEDCAD run is attached incorporating silt-fencing downgradient of the reclaimed <br />drill pad.' This evaluation indicates that there would be a settleable solid concentration of 0.00 ml/1 in <br />the effluent dischazge below the silt fence. <br />Please insert the attached Reclaimed Drill Pad SEDCAD runs in Appendix G-7, at the end of <br />Attachment lA. <br />If you have further questions or comments, please contact me at (970) 276-5206. <br />Sincerely, <br />~~ <br />Robert J.Shevling <br />Engineering Manager <br />Seneca Coal Company <br />cc: John Husband (BLM) <br />Carl Johnston (OSMRE) <br />p'.y`I+/.I n.e./11~1f' 1wb/.11M1Sa Wp..w M <br />1119/O)d' <br />Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276-3707 . FAX (970) 276-3014 <br />