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= ~ ~ = iii iiiiiiiiuiiiiii~ ®. The Pittsburg & Midway Coal Mining Co. 999 ~~ A Chevron Company 6400 South Fiddlers Green Circle, Englewood, CO 80111-0991 Phone 1303)930-4113 Wayne R. Erickson Uri1 Manager Ennrpnmenlal SemcEs September 12, 1991 " ~ a., h~rq ~ Mr. William B. Crick, Reclamation Specialist $EP 1 u tcy~ Colorado Mine Land Reclamation Division, Room 215 1313 Sherman Street Denver, Colorado 80203 Dined Land Reclamation Division RE: The Pittsburg & Midway Coal Mining Co., Edna Mine, Permit No. C-80-0001, Midterm Deficiency Review-Technical Adequacy Review Responses Dear Mr. Crick: Please find enclosed three copies of "Midterm Deficiency Review-Technical Adequacy Review Responses" for the Edna Mine. Additionally, proof of distribution to appropriate federal agencies per the CMLRD's March 7, 1991 correspondence has been provided. Included are the following revised permit materials: 1) Updated Table of Contents pages TOC-11, TOC-12, TOC-23, TOC-24, TOC- 25, and TOC-26, which replace the existing pages with the same numbers; 2) Revised section 4.3 TOPSOIL MANAGEMENT, pp. 4.3-1 through 4.3-22, which replaces the existing section of text, pp. 4.3-1 through 4.3-20 (Please note that all text materials beginning with Appendix 4.3-A should be retained as they have not been changed); 3) Revised section 4.4 REVEGETATION PLAN, pp. 4.4-1 through 4.4-21, which replaces the existing section of text, pp. 4.4-1 through 4.4-24. Existing Appendix 4.4-A should be removed in its entirety. The existing cover sheet for Appendix 4.4-B should be removed and replaced with the enclosed revised Appendix 4.4-A cover sheet. Existing cover sheets for Appendices 4.4-C through 4.4-F should be removed and replaced with the enclosed revised cover sheets appendices 4.4-B through 4.4-E. The text materials contained in the existing Appendix 4.4-F should be retained in Appendix 4.4-E in their entirety; and 4) Revised section 4.5 LAND MANAGEMENT PLAN, p. 4.5-1, which re- places the existing section of text, p. 4.5-1. Per CMLRD request, Table 4.3-6 setting suspect levels for designated soil suitability characteristics, and changes in CMLRD approval time frames for reactive erosion control plans submitted by P8M have been either added or made to section 4.3. Sections 4.4 and 4.5 have been modified to reflect the use of reference areas in setting revegetation phase III bond release standards for productivity and diversity within topsoiled lands. Additionally, section 4.4 has been modified to incorporate an average woody stem stocking density requirement of 1,000 stems per acre within the Moffat area and now includes a variable seeding rate for various categories of soil reconstruction materials (i.e., livehandled rotocleared soils @ 10 P.L.S. per square foot,