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3 <br /> • completing and submitting documentation and reports required by the permit and this <br /> SWMP. <br /> C. Facility Description <br /> The proposed borrow area is located approximately one mile southwest of Julesburg, Colorado as <br /> shown in Figure 1 (lat. 40.958585, long. -102.2611078). A detailed site plan, including property <br /> boundaries based on the legal description provided to AEC by SCRB is provided in Figure 2. <br /> Figure 2 also shows the approximate boundary of the proposed soil removal area, which covers <br /> approximately 1.2 acres of the approximate 2.5-acre land parcel. The site consists of open hilly <br /> ground covered with native grasses and shrubs. The site is bounded on the east by an easement <br /> contiguous with the Interstate 25 corridor and on the west by County Road 28. <br /> An overview of the stormwater control structures and practices are discussed in this SWMP. <br /> Drainage across the borrow area property in its current configuration is generally to the southwest <br /> and is bounded by a perimeter ditch that straddles County Road 28. Drainage from the site enters <br /> the perimeter road ditch,with flows both to the southwest and the northeast as indicated on Figure <br /> 3. The major surface water flows are directed to the southwest via the road perimeter ditch as <br /> shown on Figure 3 and Photographs 1 — 3. These flows are collected in a small depression and <br /> enter two concrete box culverts running under County Road 28, and are directed to the north <br /> through the adjacent farm property, eventually entering the Platte River drainage approximately <br /> 500 feet further north. <br /> D. Potential Pollutant Sources/Material Inventory <br /> The following is a description of the potential sources (activities and materials) that may be <br /> expected to add potential pollutants to stormwater discharges from the borrow soil borrow area if <br /> preventative measures are not undertaken. The only potential pollutant source from disturbance <br /> of the land surface is sediments from uncontrolled stormwater runoff that could be generated <br /> during borrow soil removal operations (haul roads, equipment laydown area, etc.). The control <br /> measures described below are intended to eliminate sediment transport off site onto adjacent <br /> properties or water courses. <br /> E. Control Measures <br /> Sediment is the sole pollutant with probability of degrading stormwater run-off quality. <br /> Temporary (i.e., active during borrow soil excavation ) surface water drainage controls that limit <br /> the possibility for off-site discharge of sediment-laden stormwater runoff may include alternatives <br /> as defined below. <br /> Erosion and Sediment Controls <br /> Prior to the start of active excavation, soil fencing, erosion logs (waddles) or other approved <br /> devices will be installed at the approximate locations along the County Road 28 ditch and along <br /> two existing major internal drainage channels within the site as shown on Figure 4. The erosion <br /> Sedgwick County/2023 Borrow Area Construction/Sedgwick County Construction Borrow Area Stormwater A E C <br />