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0 <br />COMPAN/ES <br />POSE OFFICE BOX 229 (+OULDER. COLORADO B03D6 <br />PHONE. (3031 44 4 215 1 <br />June 9, 1983 <br />Colorado Department of Health <br />Monitoring & Enforcement Section <br />Water Quality Control Division <br />4210 East 11th Avenue <br />Denver, Colorado 80220 <br />Dear Sirs: <br />Walden Coal Company is hereby giving notice to tFe Colorado Department <br />of Health that a "bypass" was conducted at the Bourg Property, which is <br />covered under N.P.D.E.S. permit number CO-0036854. <br />A combination of ground ~~reter and excess surface runoff accumulated in <br />the Bourg pit as a result of the unusually heavy and om tinuous precipitation <br />in the region this spring. This vrater was pumped from the pit into Mann Draw <br />where it was passed through hay bales in order to decrease the amount of <br />suspended solids before leaving the Bourg property. W~3ter was not pumped <br />into sedimentation pond C because that pond was already close to capacity. <br />Walden Coal believed that passing the water through ha,y bales in Ftann Draw <br />would be more effective than allo~•ling it to discharge directly from an <br />approved discharge point without any treatment. Sedimentation pond B, which <br />is the only other pond within a reasonable pumping distance of the pit,. <br />developed a leak during the storms and, thus, was not a feasible alternative <br />at the time of the discharge. (Water which remains in the pit at this time <br />is being pumped into pond C.) <br />Pumping began on May 23, 1983 and was completed on June 1. Table 1 <br />shows the duration of pumping each day, as well as the amount of water <br />pumped. The pump was run a total of 25 hours at a rate of 18,000 gallons <br />per hour. It is believed that all the water seeped into the ground prior <br />to reaching the closest stock watering pond, which is approximately ; mile <br />downstream. <br />