Laserfiche WebLink
TR-34 to Permit M-1977-342 <br /> Environmental Protection Plan <br /> 10. SURFACE WATER CONTROL AND CONTAINMENT FACILITIES <br /> 10.1. Surface Water Control <br /> As discussed earlier related to Mill EPF 3.1 and Mine EPF 1.2, a key strategy utilized by Henderson <br /> to prevent potential stormwater pollution is to minimize the amount of stormwater that can <br /> come into contact with disturbed land and other industrial activities. The Mine and Mill have <br /> installed the following diversion systems: <br /> • The Ultimate Canal has been constructed around the west and north ends of the TSF and <br /> routes un-impacted stormwater around the north end of the property to the Williams <br /> Fork River; <br /> • The Upper Bypass Pipeline has been constructed to divert stormwater from drainages <br /> southwest of the Mill property through an underground diversion pipe to the Williams <br /> Fork River; and <br /> • Diversion ditches have been constructed on the south side of the Mine office and surface <br /> operations to divert un-impacted storm water around industrial activities. The diversion <br /> ditch detains or conveys storm water from the south side of the upper yard west to Butler <br /> Gulch. Water from the east side of the upper yard and along the southeast side of the <br /> mine facilities are conveyed east to the West Fork of Clear Creek. <br /> Design specifications and final certification for EPFs associated with surface water conveyance, <br /> capture and storage are submitted to the DRMS each time a modification to the Reclamation <br /> Permit is proposed, as required. <br /> 10.2. Stormwater Management Plan <br /> The Henderson Mine and Mill SWMPs have been prepared for the purpose of identifying <br /> potential sources of pollution reasonably expected to affect the quality of stormwater discharges <br /> associated with operation of the Henderson Mine and Mill sites, including the conveyor that <br /> connects the sites. The plans describe and provide guidelines for the implementation of both <br /> general best management practices (BMPs) and site-specific or activity specific BMPs. These <br /> BMPs are designed to minimize the likelihood of pollutants being carried off-site through <br /> stormwater discharges. <br /> The SWMPs also provide information regarding the management of stormwater that falls within <br /> the boundaries of the Mill process water and tailing circuit and the URAD WTP. This stormwater <br /> comingles with process waters that are either managed on-site or treated and discharged under <br /> the provisions of CDPS Permit No. CO-0041467 and CO-0000230. <br /> The stormwater boundaries, BMPs, and outfall locations discussed in the SWMP are based on <br /> surface discharges resulting from stormwater. <br /> The SWMPs were developed to achieve the following objectives and goals: <br /> 1. Provide a simple format for inspection, control, prevention, and mitigation of potential <br /> pollution sources that may affect the quality of stormwater discharge. <br /> 2. Provide a simple format for educating and training site personnel in methods and <br /> practices for stormwater management and pollution prevention. <br /> Climax Molybdenum Company August,2021 <br /> Henderson Operations Page 34 of 45 <br />