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STORMWATER MANAGEMENT PLAN <br />For <br />Stormwater Discharges Associated with Construction Activity <br />CDPS General Permit COR- 030000 <br />For <br />The Reopening and Expansion of a <br />Conventional Underground Uranium and Vanadium Mine <br />1.0 Site Description <br />1.1 Construction Activity <br />The mining operation proposed under this project is the expansion of the Liberty Mine Prospect <br />NOI P- 2005 -018. The mine will be operated under a Colorado Division of Reclamation; Mining <br />and Safety (DRMS) Limited Impact 110 -d Designated Mining Operation permit. Construction <br />activities planned and anticipated will primarily be underground and will have minimal impact to <br />surface features. Disturbance to surface features will be limited to grading of an existing 0.51 <br />mile long access road, final roadway width of approximately 20 feet, and the operation pad, i.e. <br />the designated area where waste rock and soil, resulting from the underground mining operation, <br />will be stockpiled and where the mined ore material will be stocked piled and stored until it is <br />removed from the site for final processing. <br />Access road disturbance will consist of regrading an existing, currently limited use roadbed, to a <br />sufficient level of improvement to allow safe ingress and egress by employees and related <br />operational equipment. The level of improvement to the roadway will be limited to grading and <br />shaping of the existing roadway. Major cuts, fills, or widening of the roadway are not proposed. <br />Characteristics of existing drainage flow paths, resulting from slopes above the roadway and the <br />roadway runoff, will not be altered except where necessary to ensure safety to the users of the <br />roadway. Limited drainage conveyance structures, i.e. culverts, are proposed in six locations <br />along the roadway to prevent currently concentrated flows from above the roadway from <br />crossing over the roadway. These concentrated flows will be directed into strategically located <br />culvert and directed downhill to continue its flow path to the Dolores River. <br />Surface disturbance in the operations area will be limited to construction of a concrete ore <br />storage /stockpile pad and a lined sump pond to capture runoff from the ore pile. Other <br />improvements to the operations pad will include grading and shaping of a vehicle maneuvering <br />area to the north of the ore pad and mine portal. Runoff from all operations areas will be <br />captured in retention ponds to be located on the site. Other disturbance to the operations area will <br />be continual; i.e. changing size and shape of the waste rock and soil stockpile areas that will be <br />located around the mine portal. <br />The majority of water used for mining operations will be hauled in a 4,000 gallon water truck <br />from a legal source, likely the City of Moab, UT, to the site. Water, with the exception of <br />stormwater collected in the on -site detention ponds, will not be store on site. Oils will not be <br />stored on -site and will be hauled in and out when needed. Fuels will be stored on site and <br />appropriate BMPS will be used. <br />Site location - NW '/4 of the SE '/4 of Section PB- 40(10), T50N, R19W, of the NMPM, Mesa <br />County, Colorado. <br />