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Ronald G. Thompson <br />Peak Project Management, LLC <br />34115 County Road 20.8 <br />Trinidad, CO 81082 <br />(719) 846-4975 <br />Via Certified Mail - 7000 0600 0026 9607 7741 <br />October 24, 2004 <br />Colorado Department of I~lealth <br />Water Quality Control Division <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South <br />Denver, Colorado 80222-1530 <br />Re: Discharge Monitoring Report- 3'~ Quarter, 2004 <br />Lorencito Canyon Mine -Permit No. COG-850044 <br />Enclosed are the DMR's for the above referenced permit Tor the third quarter of 2004. Outfalls 001 A, 002, <br />003, 004A, 014, 015, 017, 018, 019, 020, 021, 022, 023, 024, 025, and 026 have not been constructed. The <br />mine is closed and no disturbance has occurred within the drainage areas reporting to these proposed ponds. <br />Ou[falls OOG and OIOA have been constructed and no discharge occurred from These facilities during the <br />Quarter. <br />The Lorencito Mining permit documents the I Oyr-24hr event as precipitation of greater than 2.90" in a 24- <br />hourperiod and the 100-year, 24-hour event as 4.20". A rain gage is maintained on site in an area centrally <br />located between ponds 005, 006, 007, 008, 009 and 009A On the evening of August 3, 2004, 0.9 inches of <br />rain was received; this was followed by 3.5 inches on August 4 from approximately I :30 pm to 5:00 pm Tot' <br />a 24-hour storm event of 4.4 inches. 'Phis exceeds both the I0-yr and 100-yr storm events. Ponds 007, 008. <br />009, and 009A all discharged as a result of this storm event. <br />Outfall 008 was sampled and was in compliance for all sample parameters. "fhe operator, Lorencito Coal <br />Company, is requesting the application of alternate limitations for a storm event of greater than the 10-year, <br />24 hour event for the August 4, 2004 event for outfalls 007A, 009, and 009A for the following parameters: <br />Outfall Parameter Limitation Analytical Result <br />Pond 007A TSS 30-Day Average 35 44 <br />Total Iron, Daily Max. 7.0 5.63 <br />30-Day Aver. 3.5 5.63 <br />Pond 009 TSS, Daily Max. 70 I UC <br />TSS 30-Day Average 35 I O6 <br />Total Iron, Daily Max. ZO 12.8 <br />Total Iron, 30-Day Aver. 3.5 12.8 <br />Settleable Solids, Max. 0.5 4.6 <br />