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~: -~~.~ <br />~4 Ct)~~ DEPARTMENT OF NATURAL RESOURCES <br />R~ R9 <br />• ~e ~~ O David H. Getches, Executive Director <br />;-~,r~;.0 MINED LAND RECLAMATION DIVISION <br />« • DAVID C. SHELTON, Dlrettor <br />7876 # <br />Ricnartl D Lamm <br />Governor -...Ir~_-u' <br />-_r <br />September 14, 1983 <br />~:.~ . . <br />.~ ... <br />Mr. Dave McMindes r•~•~ - <br />Environmental Coordinator - - - <br />Colorado Yampa Coal Company - <br />P.U. Box 774288 - - <br />Steamooat Springs, Colorado 80477 ~:~` <br />RE: Technical Revision, Permit No. 79-177 •.~ <br />Area 6 Sediment Ponds ~-~~ <br />Dear tor. McMindes: <br />• Colorado Yainpa Coal Company (CYCC) has requested an exemption from the <br />permit requirement to construct sediment ponds p, R and S on Area 6 at <br />Energy Mine No. 2. Rule 4.05.2(2) requires that sediment ponds be <br />maintained only until the disturbed area has been reclaimed, herbaceous <br />cover on the revegetated area is at least 90% of the cover of the <br />reference area and the quality of the untreated runoff meets applicable <br />State and Federal water quality standards. Nn adequacy letter was sent <br />on July 11, 1983 to which CYCC responded on August 23, 1983. CYCC <br />submitted additional veyetation information, sediment yield calculations <br />and actual runoff quality data. <br />The vegetative cover data shows that the herbaceous cover on Area 6 is <br />greater than the herbaceous cover on the pasture reference area. The <br />water quality data submitted by CYCC indicates that ponds are not needed <br />for Area 6 because the untreated runoff meets water quality standards. <br />Also, there is no point source discharge from Area 6 since the Department <br />of Health has released the site from IVPDES requirements. <br />Based on the vegetative and water quality data submitted oy CYCC, the <br />Division recommends that the technical revision request be approved. The <br />request is in compliance with Rule 4.05.2(2). If however, an inspection <br />reveals an area of erosion or gullying, the operator may be required to <br />implement alternative sediment control measures and/or re vegetation to <br />remedy the problem. <br />• <br />Ex. 29-27 <br />a23 Centennial Building, 7373 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />