|
' ..,
<br />COLORADO
<br />Division of Reclamation,
<br />u Mining and Safety
<br />Department of Natural Resources
<br />1313 Sherman Street, Room 215
<br />Denver, CO 802.03
<br />April 14, 2016
<br />James E. Stover
<br />J.E. Stover Et 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 />2015 Annual Hydrology Report
<br />Dear Mr. Stover,
<br />The Division received a copy of the 2015 Annual Hydrology Report for the North Thompson Creek Mines on
<br />March 17, 2016. The Division has finished its review and has the following comments:
<br />The hydrologic monitoring plan is presented on page 3-86 of the currently approved permit
<br />application package requres that water quality samples be taken on North Thompson Creek
<br />in May and September of each year. Parameters tested include: pH, Total Dissolved Solids,
<br />Total Suspended Solids, oil and greese, Bicarbonate, Calcium, Chloride, Iron, Magnesium,
<br />Manganese, Sodium, Sulfate, Zinc, and Copper. The correct frequency and parameters were
<br />tested for in 2015 on Upper and Lower North Thompson Creek. Water quality data collected
<br />for North Thompson Creek is similar between the upstream and downstream locations.
<br />The approved permit application package requires the discharge from Mine No. 1 to be
<br />sampled annualy in June for the following parameters: pH, Total Dissolved Solids, Total
<br />Suspended Solids, oil and greese, Bicarbonate, Calcium, Chloride, Iron, Magnesium,
<br />Manganese, Sodium, Sulfate, Zinc, and Copper. Discharge from Mine No. 1 and Mine No. 3
<br />were sampled on June 29th of 2015 for the correct parameters.
<br />North Thompson Creek was not impacted by the water discharged from Mine No.1 or Mine
<br />No. 3 in 2015. Minrec, Inc. reported that there was no discharge recorded through Outfall
<br />001 during the year. Since 2010, water from Pond T-2 was directed to flow into Pond P9.
<br />When Pond P9 fills the flow continues through an open ditch to the Refuse Pond. Water
<br />impounded in the Refuse Pond does not discharge from the pond. This was approved as a
<br />part of the developed water resource post mining land use.
<br />The Division finds the 2015 Annual Hydrology Report to be in compliance with the Rules and the approved
<br />permit application. The Division has no questions or further comments. If you have any questions, please
<br />contact me at (303) 866-3567 x8144.
<br />�.� CO,.
<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, Governor I Mike King, Executive Director I Virginia Brannon, Director x
<br />1876„ r
<br />
|