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Climax Molybdenum Company HENDERSON MINE SWMP <br /> Empire, CO April 2021 <br /> 1 .0 INTRODUCTION AND OBJECTIVES <br /> This Storm Water Management Plan (SWMP or Plan) has been prepared for the Climax <br /> Molybdenum Company, Henderson Operations (Henderson) Mine facility. The purpose of this <br /> Plan is to identify potential sources of pollution which may reasonably be expected to affect the <br /> quality of storm water discharges associated with the operation of the Henderson Mine and URAD <br /> Water Treatment Plant(WTP). The Plan describes and provides guidelines for the implementation <br /> of both general best management practices (BMPs) and site- or activity-specific BMPs. These <br /> BMPs are designed to minimize the likelihood of pollutants being carried off-site through storm <br /> water discharges. <br /> The storm water boundaries, BMPs, and outfall locations discussed in this SWMP are based on <br /> surface discharges resulting from storm water events. The fate and control of groundwater <br /> associated with the facility's process water is managed under a different authority and is beyond <br /> the scope of this SWMP.1 <br /> This SWMP has been formulated and implemented with the following objectives and goals: <br /> • To provide a simple format for inspection, control, prevention, and mitigation of potential <br /> pollution sources that may affect the quality of storm water discharge; <br /> • To provide a simple format for educating and training site personnel in methods and <br /> practices for storm water management and pollution prevention; and <br /> • To provide assurance that the provisions of CDPS General Permit for Storm Water <br /> Discharges Associated with Metal Mining Operations and ancillary activities, CDPS <br /> Permit No. COR-040000, are met. <br /> 1 Groundwater at hard rock mine and associated milling sites in Colorado is regulated by the <br /> Division of Reclamation and Mine Safety (DRMS) under authority of Senate Bill 89-181, C.R.S. <br /> § 25-8-202(7), and the Dec. 14, 2010 Memorandum of Agreement between DRMS and CDPHE <br /> addressing the "implementation of SB 181 Amendments to the Colorado Water Quality Control <br /> Act (25-8-101, et seq) pertaining to the regulation of mineral mines. Henderson has been issued <br /> and operates under Regular(112)Mining and Reclamation Permit, Number M-1977-342. <br /> Page 1-8 <br />