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<br />III IIIIIIIIIIIIIIII <br />srnrc or r_oi.o ren oo o,r, v.i-nn in:•.ra ~, ,.,.,,.,. 999 <br />DEPARTMENT OF NATURAL RESOURC[S <br />D. Monte Pascoe. Ezec utme Duector <br />MINED LAND RECLAMATION <br />423 Centennial Build ~ing. 1313 Sherman Street <br />Denver, Colorado 80203 Tel. (303) 866-3567 <br />David C. Shelton <br />Director <br />November 5, 1981 <br />Water Quality Control Division <br />Colorado Department of Health <br />9210 East 11th Avenue <br />Denver, Colorado 80220 <br />Attn: Sandy Squires <br />Re: Ohio Creek Afine No. 2 <br />Our File No. C-002-30 <br />Dear Sandy: <br />In response to our telephone convez'sation on October 28, 1981, the Colorado <br />hfined Land Reclamation Division has reviewed and approved the sediment control <br />plan for the Ohio Creek Mine No. 2 (OC ~2) under the provisions of Rule 9.05. <br />OC k2 is a small underground coal mine (3.2 acres of disturbance) with one <br />sediment pond. The sediment pond is already in existence and has been <br />designed to contain the runoff from a 10-year, 24-hour precipitation event. <br />The emergency spillway is designed to safely pass the peak flow from a 25-year, <br />24-hour precipitation event. The principal spillway/dewatering device is a <br />trickle tube which allows for a retention time of 29 hours. <br />If you need Further information, please call me. <br />~i ncerely <br />J~m Nerron <br />Reclamation Specialist <br />JH/mt <br />