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Blue Pit 112 Permit Amendment <br />Stormwater Management Concepts <br />The general plan for controlling stormwater on site is to prevent undisturbed runoff from entering <br />the pit and direct runoff from the pit slopes to the pit floor and allow it to infiltrate to the <br />groundwater. <br />Maintenance of Best Management Practices <br />The BMP's for this operation are the contemporaneous reclamation of the slopes, the installation <br />of bench catchment benches ditches and the installation of grouted channels to bring the water to <br />the bottom of the pit. Western Slope Aggregates is responsible for the maintenance of these <br />structures. <br />Stormwater Management Plan Application <br />A Discharge Permit is not required for this site through the Colorado Department of Public Health <br />and Environment because there will be no discharge, since there will be no runoff for the ioo year <br />event. The Stormwater Management Plan is a sub part of this permit and is therefore also not <br />required. See the attached letter from Kathryn Dolan of CDPHE for more information. <br />Blue Pit May 2014 G -6 <br />