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TRAPPER MINING INC. April 19, 2007 CERTIFIED O `~~ Q Gtr Ms. Carla Lenkey C~~ ' ~j4 ~'~p1vtots Colorado Department of Public Health and Envirortment PQ~ ec~ameti9 WQCD-PE-B2 ao~R drat 4300 Cherry Creek Dr. South p~t~ ~~9a Denver, CO 80222-1530 SubjeM: First Quarter 2007 Colorado Wastewater Discharge Monitoring Reports Permit No. CO-0032115 Dear Ms. L.enkey: Enclosed are Trapper Mine's First Quaver 2007 Colomdo Wastewater Discharge Monitoring Reports for the period Ol/1I07-03/31/07, During this quarter, seven NPDES outfalls were active. Outfalls 001, 002 and 020 discharged routinely throughout the quarter. Outfatls 011, 013, 017, 021 discharged in response [o spring snowmel[ surges occurring in early February and March. Outfalls 005, 008, 009, 012, 013, 014, 015, 016, 018, 019, 022, 023 and 024 did not discharge during the quaver. Values reported on the enclosed DMRs represent the maximum (or minimum as applicable) monthlyldaily values generated at each outfal] during [he quarter. Also enclosed are monthly NOAA weather summaries for the reporting period and WET test report forms as applicable. Three outfalls were sampled for WET analyses during the quarter. Two species acute tests were completed at outfalls 011, 020 and 021. No exceedances of WET test limitations were observed at any tested outfalls. No mine water was discharged through outfal) 017; therefore no WET tests were conducted at this outfal). All active outfalls experienced two intense spring runoff events during the quarter. Starting February 6th and continuing for several days, the site warmed drastically from subzero temperatures into the mid 40's. This warm period combined with fair snow pack on the site and frozen soil conditions resulted in an intense snowmel[ event. The March event was in relationship to the final melting of the winter snow pack on the site during a warming period starting March 5'" and continuing through the remainder of the month resulting in increased runoff and unseasonably warm weather The enclosed NOAH weather sutnmary reports show the temperatures and snow depth measurements for the period mentioned. Daily precipitation measurements are recorded at 7:00 a.m. as well as daily maximum and minimum temperatures from [he previous 24 hours. Primary effluent limitations were exceeded on two outfalls, (011 and 017) for TSS and Total Iron parameters. The altema[e limitations will be applied to outfalls 011 and 017 due to the nature of the snowmelt events. Samples were taken at each outfal) during routine weekly monitoring. On two separate occasions intense runoff and snowmelt occurred during the quaver. Above average temperatures and moderate snow pack melting contributed to the exceedances in February. Frozen ground caused the snowmelt event to be exaggerated in terms of surface runoff. The March event followed the final melting of our snow pack on the site and the increased runoff associated with that event. Samples taken on February 13, 2007 during routine weekly monitoring resulted in and exceedance of TSS and Total Iron at outfalls 011, and 017. Also samples taken March ]3, 2007 showed an exceedance of TSS at outfal) Oll. The alternate limitations for Settleable Solids, applicable in the event of discharge caused by precipitation (or snowmel[) less than or equal to the 10-year, 24- hour precipitation event, was met at all outfalls. No exceedances of primary effluent limitations for pH occurred during the quarter. P.O. Box 187 Craig, Colorado 81626 (970) 824-4401