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' ~ ~`xa e,nviror-menta/ fs er-grn@enn~ , February 1Q 2005 _ RECEIVED , Thomas A. Schreiner / • Transportation " Environmental Protection Specialist FEB ~ ~ Z(a5 '/ Division Of Minerals and Geology • ~aiid Devetopirrnt 1313 Sherman St:, Room 215 Denver, Colorado 80202. Olvision ~f Minerals and Gem • Atirxng >/ /~~ Re: Response to Adequacy Review Comments -File Pit 112 Application, M-200 -04 47 Dear Tom: Responses to your comment have been incorporated into revised exhibits and or as indicated in _ responses below. All changes have been filed with the Weld County Clerks office on 10/11/05. 6.4.3 EXHIBIT C -Pre-Mining and Mining Plan Maps of Affected Lands. 1. Both of these drawings-have been edited fo include irrigation"ditches. All-ditches newly added to the drawings are owned by the applicants, Fafivmwurkin LLLP and Kenneth Schell - 6.4.4 EXHIBIT D -Mining Plan.- - 2, West of WCR, 3.25, approximately 120 acres will be disturbed, approximately 60 acres and 6 acres will be reclaimed to ponds and leaving approximately 54 acres of disturbed area to be backfllled topsoiled and re-vegetated. On the east side of WCR 3.25, 10 additional acres will be disturbed and will be backfilled (slopes pushed to 3:1) topsoiled'and ~e-vegetated. 3: In the Agreement For Plug and Abandonment of Oil and Gas Well -Texas Tea LLC Nelson #2 (see Attachment A), Item 3. includes a provision for moving flow lines. 4. -The maximum number of oil and gas sWctures to be backfilled at "any given time will be one. The volume needed for backfilling is approximately 85;000 yd3. Given a maximum of 15-20 acres of open un-reclaimed pit, then a maximum of 3000 linear-feet of 0.5:1 unlined slope cah ' occur at any .one time. Approximately 32,000 yd3 of topsoil will be needed to reclaim 15-20 ogres of open pit. The total water volume: of the 60 and 6 acre ponds iS approximately 2135 . acre-feet. 'The depression on the east side of WCR 3.25 would-hold approximately 98 acre-ft. The mining plan have been updated to reflect this infdrmation 6.4.5 EXHIBIT E -Reclamation Plan. 5. The reservoir slopes have been revised to 3:1 in all cases 6: -The embankment crest measures approximately 307 8 on the west side, 361 feet on the north side and '283 feet on the east side near the maximum sections. EXHIBIT F Has been annotated with these dimensions. 7. The reGamation'drawings including cross sections have been submitted to Mark Haines of the -Dam Safety Divisidn of the"SEO. Mark has drafted a letter stating that the embankment structure can proceed as designed. Letter is included in Attachment B 8: The reclamation plan has been modified to include topsoil replacement of 12 inches. 9. `The reclamatidn plan- has been modified to include tamarix management strategy and herbicide application. " 10. The constructiori of the Gay liner will fgllow those procedures and geometry as defined in M- 2003-90 1D395 Colfax Atre.: Suite 350, Lakewaati CO 8D215 ph 303-436-D95] fax 3U3-436-D953 '. ..-._,i ..-.-., ,... ... ..._-_.. T_... -. ., -, _ ,-_, ,. .- -.- ..- -.,, ,