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~~ ~ Cyprus Yampa Valley Coal Corporation An AIIIHare of Cyprue Mlner~b Company May 15, 1989 ~~~ I~~I~~~~~II~~I~~ 28587 Roull county Road N27 Oak Creek, CO BOa87 Phone (383) 87&9800 ~,~nY 1 c. ~~~~ hir. David Berry Colorado Mined Land Reclamation Division 1313 Sherman Street, Room 215 Denver, CO 80203-2273 RECLI.IP~,V'i )OPl ~;ViSI©i~i Dear Mr. Berry: Technical Revision 89-23, Hydrol ~tions - Modifications; Mines 1, is Features/ Small Area & Eckman Park Colorado Yampa Coal Company (CYCC) has made the following revisions to Maps 9A & l0A as requested in the CMLRD's letter dated April 4, 1989. Map 9A & l0A i 1. Pond P; was added to both Maps 9A & 10A. / 2. Culvert to Pond B; was added to Map 9A. 3. Monitoring Station Symbols; were added to Map 10A. 4. Springs F, G, H, I, K, EP- 87-01, EP-87-02; were added to Map 10A. 5. Check dam near Pond C; was added to Map 9A. All culverts which currently exist on-site but were inadvertently left off Map 9A are now shown. Well 026-87-9 has been deleted from the Mine 1, 2, & Eckman Park hydrologic monitoring plan by Technical Revision 88-22 which was approved on January 31, 1989. All drainage ditches and culverts located along the southwest margin of Area 60 have already been shown on hlap 9A. The road culverts observed in area 60 during the March 1989 CMLRD inspection have been plugged at the inlets and are buried. Since the road culverts are nonfunctional they will be removed during May or June 1989. Due to the nature of the 1000 scale maps, the permit area and Pond A drainage located at the southwest part of Eckman Park was not supplied. CYCC will draft a new map in 500 scale to show the southwest part of Eckman Park which will include the permit area and Pond A drainage inadvertently left off of Maps 9A and 10A. The drafting of the southwest part of Eckman Park involved the generation of two additional maps to include the entire permit area. c~RUs