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J.zL' 1 C1~1.L1~a iYI1~~Z~V-G CO~~IP~ili~"~' <br />P.O. Box 70 ~ <br />I <br />Loma, Colorado 81524-0070 <br />(303) 858-3608 <br />October 5, 199°_ <br />Ms. Anne Ihlenfeldt <br />CDOH - Water Quality Control Division <br />Permits and finforcement Sectien <br />4210 fiast 11TH Avenue <br />Denver, CO 80220-3716 <br />Re: Permit CO 003834° <br />Dear Ms. Ihlenfeldt; <br />Salt Creek Mining Company requests and exemption from the effluent <br />requirements of Permit CO-0038342 (Section I A 1 c) for a~single <br />discharge that occurred on July 13, 1992. As we have discussed <br />previously, on the night of July 12, 1992 there was a 100%year 24 <br />hour storm event at Salt Creek's McClane Canyon Mine. The sediment <br />pond at the mine was completely filled with water and sediment. <br />This pond is designed to retain the volume of six 10 year~24 hour <br />events. 'Prior to the storm there was approximately the volume of <br />one 10 year event stored in the pond. An unknown quantity of water <br />and sediment bypassed the pond through the emergency spillway and <br />overflowed the embankment after the pond was filled. <br />On July 13, 1992, Mr. John Kubic of your office was informed of the <br />storm and the need for Salt Creek to discharge the water i'n the pond <br />to regain the capacity of the pond for the next storm. The standing <br />water in the pond was discharged and sampled. By letters dated July <br />20, 1°°'? and A::g:~t 3, 199; as we1T as, phone calls, your office <br />has been informed of the discharge and the sample results. Copies <br />of the letters and sampling results are being submitted with this <br />request for exemption. <br />Please call if there are questions or if I can be of assistance. <br />yS,~-ncerPly, <br />~~~~~~~ <br />Join h1. Walters <br />Manager of Mine Services <br />