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~~ ~~ <br />MINED LAND RECLAMATION DIVISION <br />• Department of Natural Resources <br />1313 Sherman 5:.. Room 215 <br />Denver, CO B^u203 <br />303 866~36ii <br />Fa z~303 832-8106 <br />of ~o~ <br />~ '.e <br />.t . i.. J <br />•.~ ~~- <br />~ /P'lo ~ <br />Fov ~'. <br />C~.e.ro <br />F rea R Banta <br />Qv~Sgn QrMp <br />March 13, 1990 <br />Mr. Jim Hendricks <br />Pueblo Coal Incorporated <br />278 Sawyer Drive <br />Suite lA <br />Durango, Colorado 81301 <br />RE: Carbon Junction Permit kenewal #1, File Flo. C-82-054 <br />Uear Mr, Hendricks: <br />In reviewing the approved drainage <br />site recently, a concern has arisen <br />• permit renewal could be issued. We <br />as discussed below, along with the <br />June 1, 1990, <br />and sediment control plans for the mine <br />which we will need to resolve before a <br />are requesting that you address the issue <br />previously identified concerns, by <br />Appendix 5-2 of the permit application indicates that design criteria for all <br />of the various diversion and collection ditches at the mine, including the <br />proposed permanent channel realignment of Caroon Junction Drainage were based <br />on Handling runoff from the 10-year, 24-hour precipitation event. In order to <br />comply with the requirements of kule 4.09.1(5) and S.D9.2(7), the permanent <br />channel realignment as well as diversions above the fill and collection <br />channels wnicn receive runoff from the fill would need to be designed and <br />constructetl to safely pass the runoff from a 100-year, 24-hour precipitation <br />event. 7ne criteria would apparently apply to Diversion Ditch No. 2, the past <br />Fill and West Fill downdrains, and the permanent channel realignment. <br />Upon completion of the approved mining and reclamation plan, flows from Caroon <br />Junction Drainage above the disturbed area would be routed around the excess <br />spoil fill via the permanent channel realignment. However, measures to insure <br />that flows from the drainage above the fill would be diverted away from the <br />fill into stabilized channels off the fill during operational and construction <br />phases are not specified. <br />STATE OF COLORADO <br />• <br />