Laserfiche WebLink
AVCOLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />May 8, 2017 <br />James E. Stover <br />J.E. Stover & Associates, Inc. <br />2352 North 7th Street, Unit B <br />Grand Junction, CO 81501 <br />RE: North Thompson Creek Mines, Permit No. C-1981-025 <br />2016 Annual Hydrology Report <br />Dear Mr. Stover, <br />The Division received the 2016 Annual Hydrology Report (AHR) for the North Thompson <br />Creek Mines on January 19, 2017. Thank you for your timely submittal. The Division has <br />completed reviewing the report and has the following comments: <br />The hydrologic Monitoring Plan is presented on page 3-86 of the currently approved <br />permit application package (PAP) requires that water quality samples be taken on North <br />Thompson Creek in May and September of each year. Parameters tested for include: pH, <br />Total Dissolved Solids, Total Suspended Solids, oil and grease, Bicarbonate, Calcium, <br />Chloride, Iron, Magnesium, Manganese, Sodium, Sulfate, Zinc and Copper. The correct <br />frequency and parameters were tested for in 2016 on upper and lower North Thompson <br />Creek. Water quality data collected for North Thompson Creek is similar between the <br />upstream and downstream locations. <br />- The approved PAP requires the discharge from outfall 001 to be sampled annually in <br />June for the following parameters: pH, Total Dissolved Solids, Total Suspended Solids, <br />oil and grease, Bicarbonate, Calcium, Chloride, Iron, Magnesium, Manganese, Sodium, <br />Sulfate, Zinc and Copper. Samples from Outfall 001 were not collected due to there <br />being no discharge from Outfall 001 during 2016. <br />- North Thompson Creek was not impacted by the water discharged from the No. 1 Mine <br />or the No. 3 Mine. Water from these points is not discharged into North Thompson <br />Creek. Minrec, Inc. reported that there was no discharge through Outfall 001 during the <br />2016 calendar year. Since 2010 water discharged from Pond T-2 was directed to Pond <br />P9. When Pond P9 fills to the point where it discharges, the water it routed through a <br />�� pF C0� <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Govemor i Robert W. Randall, Executive Director i Virginia Brannon, Director <br />�` 1876 <br />