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<br /> <br />~~~~i <br />.111E 17 <br />MINED LAND <br />RECLAMATION OIVI51~•' <br />~5~ <br />P•1s. ,finny Torrez <br />Permits and Enforcement Section <br />Water Quality Control Division <br />4210 East 11th Avenue <br />Denver, CO 80220 <br />iti" <br />i~~~~. <br />~~~) t' <br />t..~ JINN :.: <br />• 11111 rrli~irf <br />SNOWMASS COAL COMPANY <br />Mine 0ll~ce~ P.O. Box 980 <br />Carbontlale. Colorado 81623 <br />13031 963-3aa0 <br />*'.~~ :. <br />~OCp Pte' ~1ay 20, 1985 <br />RE: Snowmass Coal Companies NODES Permit #CO-0029599 <br />Dear Ms. Torrez, <br />As per section A(2)(B)(2) of our NPDES permit I'am submitting to you the <br />following information concerning the emergency discharge of abandoned mine water <br />from our outfall number 003. <br />The water in question is coming from an old abandoned mine above our #1 <br />mine. This mine was last operated in the 1950's by another company. It is ap- <br />parent that this water is coming from surface snowmelt which is finding its way <br />into the old mine. This water is reacting with the stagnant water in the aband- <br />oned mine and is causing the water level to rise enough so that it has punched <br />a hole in a mine seal and is leaking into our active mine workings. In order to <br />protect the quality of our mine discharge we piped this water out of our mine <br />and let it run to our Lower Washplant Pond (outfall 003). The following is a chron- <br />ological list of the events leading up to the time I contacted you. <br />On May 7, 1985 we extended a pine out of our portal and allowed the water to <br />flow to our Lower Washplant Pond for storage. We hoped that the flow would cease <br />so tat no d'scharge would take place. The flow was 250 GPM, pH 3.1, temperature <br />9.3 C, and conductivity 4500 umhos/cm. <br />On May 9, 1985 Snowmass Coal took water samples at the pipe discharge and <br />at the inlet of the Lower Washplant Pond. tJe wanted to see if the flowing- action <br />of the ureter was heloinq to oxidize the iron in the water. These results were as <br />follows: <br />Pipe Discharge <br />Field: pH 3.1 Temperature 9.3oC Conductivity 4400 umhos/cm <br />Lab pH 2.8 Suspended Solids 420 mg/1 Total Iron 312.1 mg/1 <br />Pond Inlet <br />Field: pH 3.5 Temperature 12.1oC Conductivity 4300 umhos/cm <br />Lab pH 2.71 Suspended Solids 420 mq/1 Total Iron 301.5 mg/1 <br />