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2011-08-08_REVISION - M1977493 (33)
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2011-08-08_REVISION - M1977493 (33)
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Entry Properties
Last modified
8/24/2016 4:36:39 PM
Creation date
8/9/2011 7:39:42 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977493
IBM Index Class Name
REVISION
Doc Date
8/8/2011
Doc Name
EPP Submittal
From
Climax Molybdenum
To
DRMS
Type & Sequence
TR18
Media Type
D
Archive
No
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• <br />• <br />Technical Revision (TR -18) Climax Molybdenum Company <br />Environmental Protection Plan Permit No. M- 1977 -493 <br />and alignment. <br />The design of the Robinson Lake reclaim water pump system is based on using the existing outlet pipe <br />from Robinson Lake. A new hydraulically actuated outlet works valve was installed in 2008 along with <br />new piping at the downstream toe of the embankment. In 2011, as part of construction of the new <br />Robinson Lake Pump Station, new piping will connect the outlet works piping into the pump station. <br />The Robinson Lake Pump Station building is designed as a pre- engineered metal building. No potable <br />water or sanitary sewer systems are designed to be included in the building. The building is configured <br />so that all spills and leaks inside the building are captured by a sump and pumped to Robinson Lake by a <br />dedicated sump pump. <br />The pump station and pipeline are designed to preclude accidental discharge to Eagle Park Reservoir <br />and East Fork Eagle River. If a leak were to occur in the pipeline, water would either flow into one of the <br />surface containments on site such as Robinson Lake or Robinson TSF or the Robinson Dam seepwater <br />collection ponds. As with other EPFs, Climax conducts daily visual inspections of all active pipelines <br />during each shift, and will include inspections of the entire reclaim system during each shift when that <br />pipeline becomes operational. These frequent visual inspections provide for immediate detection and <br />response should a leak occur and are a key component to a comprehensive monitoring /mitigation system <br />to prevent potential environmental impacts. Additional information regarding system alarms at the <br />Robinson Lake Pump Station is in Section T- 5.4.2. <br />Chalk Mountain Interceptor. An extensive clean water interceptor system has been established by <br />Climax around the affected areas of the Eagle River Watershed. The Chalk Mountain Interceptor <br />conveys storm water around the process facility and TSFs, which limits the amount of impacted waters to <br />be treated and discharged. As agreed upon with DRMS, although this interceptor is considered to be a <br />pre -EPF system and does not contain or control designated chemicals or process solutions, it will be <br />managed as an internal EPF. The interceptor is closely monitored, inspected and maintained as part of <br />routine site monitoring activities. Other than normal repair and maintenance, any future expansion or <br />modifications of the interceptors will be subject to review by DRMS, consistent with Section <br />6.4.21(10)(a)(ii) of the Rules. <br />This Chalk Mountain Interceptor starts near the top of Fremont Pass and collects runoff primarily from the <br />north slope of Chalk Mountain. The system discharges the collected water either into Eagle Park <br />Reservoir or into the East Fork Eagle River. Except for a few culvert sections, the interceptor consists of <br />an unlined ditch that is cut into the hillside. The ditch is paralleled by an access and maintenance road. <br />T -5.3 Tenmile Creek Watershed <br />T -5.3.1 Potential Sources of Contamination <br />The open pit mine, mill facilities, overburden storage facilities (OSFs), and the Robinson, Tenmile and <br />Mayflower TSFs are all located within the Tenmile Creek Watershed (Figure AM- 06- T -01). Most of the <br />mine's water treatment/management activity occurs within the Tenmile Creek drainage area and must <br />address: (1) a component of water that is pumped from the Eagle and Arkansas River drainages to the <br />Tenmile drainage; (2) a large component of minimally impacted runoff from areas above the interceptor <br />channels within the Tenmile drainage; and (3) wastewater from the mill circuit and water which has had <br />direct contact with mine tailing, overburden, or other disturbed areas. <br />Water from the Arkansas River drainage introduced to the Tenmile drainage includes water from the <br />underground mine workings (5- Shaft) and water from the Arkansas Well used for domestic supply at the <br />mill. Water introduced from the Eagle River drainage includes dam seepage (1 and 4 Dam), and runoff <br />collected in Robinson Lake that may enter the Tenmile drainage area as makeup to the mill water circuit. <br />All other waters managed by Climax originate as snow or rainfall within the Tenmile Creek drainage on <br />the mine site or on land above the interceptor canals. <br />The upper Tenmile Creek Watershed, including its tributary drainages of McNulty Gulch, Kokomo Gulch, <br />Searle Gulch, Rose Gulch, Tucker Gulch, Humbug Creek, Mayflower Creek, and Clinton Creek, has been <br />EPP: Revision R1 <br />T -21 July 2011 <br />
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