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STORMWATER MANAGEMENT PLAN <br />LINCOLN COUNTY PICKENPAUGH PIT <br />M-1978-078 <br />As required by the State of Colorado Department of Public Health and Environment to reduce the chance of <br />any possible pollutants reaching waters of the State of Colorado, let this serve as a Storm Water <br />Management Plan (SWMP) that can be modified as needed should any of the Lincoln County mining <br />practices/operations change within streambeds of rivers and creeks within Lincoln County. Or should any <br />open pit operation within the County be located or have the slope changed to allow Stormwater to come in <br />contact with any waterway that would drain into a State waterway. <br />Lincoln County does not nor should need to store any materials on site. All equipment used in the removal <br />of material from the site is trucked in, bulldozers and front end loaders are fully fueled and removed once <br />the work is complete. All fueling or repairs take place on the haul road or loading area well away from the <br />outer boundaries of the pit. All overburden or topsoil that needs to be stockpiled until reclamation are <br />seeded or allowed to stabilize well away from the banks of the creek or streambed. Stockpiles are kept to a <br />minimum and should rarely be left for long periods of time. <br />Most sand and gravel pits within Lincoln County are located well away from any drainage areas that would <br />allow water to enter Colorado Waters as defined, the storm water remains in the pit area until it perks into <br />the soil. Streambed operations have all materials stockpiled well away from the banks and rarely remain for <br />long time periods. The District Road Foreman for District 3 shall be responsible to assure that this plan is <br />followed and that all Best Management Practices are implemented and up-dated as needed to insure that <br />any storm water that may enter the streambed of Horse Creek has not been polluted by poor management <br />practices. Semi-annual site inspections will take place to insure that the County's practices are performing <br />as expected. <br />BEST MANAGEMENT PRACTICES <br />At no time will any mining activity take place when there is water in the pit area <br />All overburden and topsoil shall seeded to allow for Revegetation to take place in order to control <br />stormwater run off or prevent polluted stormwater from contacting the streambed. <br />Any needed refueling shall take place away from the mining area on the haul road or the parking/loading <br />area with special care taken to avoid any spills. Should a spill happen, the area would be cleaned by <br />removing the soil or material to a depth of one (1) foot and twice the size of the spill area and removed <br />from the site according to EPA regulations. Any spill that falls within the required reporting to Haz-Mat <br />shall be reported in a timely manner and will also be reported to the Board of County Commissioners. The <br />cleanup requirements of a spill will also apply to any other fluids that may need to be added to the <br />equipment or should any hoses break on the equipment. All repairs will take place in the loading area or on <br />the haul road whenever possible. Any equipment left on site will be parked well away from the boundaries <br />of the pit where drainage could enter Horse Creek. At no time shall fuel or other fluids used to service the <br />equipment be stored on site but will be hauled in as needed. <br />The following items will be utilized to minimize erosion in the area of the pit; earth berms, weed-free straw <br />bales, straw logs and roughened pit slopes. The slopes will be roughened and left with ridges that run <br />normal to the slope not parallel to the slope. The bottom of the pit area will be regraded as needed to hold <br />water in the pit area until it can percolate into the soil.. The berm that was overtopped will be rebuilt to <br />restore its functionality. <br />Modified: March 19, 2010