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• <br />water to pass through while filtering out any sediment in the water. The bottom <br />of the fabric needs to contact the ground in such a fashion that there is no flow <br />under the fence. This can be accomplished by either entrenching 6 to 12 inches of <br />the bottom of the fabric or by laying the bottom 6 to 12 inches of fabric down, in <br />the uphill direction, and burying it with compacted soil. Silt fences will be <br />installed in downslope areas, along any site boundary near surface waters, and <br />along property boundaries. <br />• Straw Bale Barriers are barriers used to minimize the amount of sediment in <br />stormwater runoff. They will be installed in ditches and at culvert exits to filter <br />out sediments and to reduce flow velocities so that suspended solids will settle <br />out. The bales will be entrenched 3 to 6 inches into the ground. Joints between <br />bales will be filled to eliminate leaks, and soil on the uphill edge must be <br />compacted to minimize leakage under the bales. <br />• Sediment Traps (Check Dams) are basins used to slow the velocity of large <br />quantities of runoff so that suspended soils will settle out. No sediment traps are <br />planned for the construction phase of the project. Check dams, which are simply <br />very small sediment traps, will be used in relatively flat sections of ditches to trap <br />sediment. They will be constructed of either straw bales or gravel - filled sand <br />bags. <br />• Ditches and Berms can be utilized to direct flows from other surrounding areas <br />toward a sediment basin or other area where sediment is allowed to settle from the <br />flow. <br />• Outlet Protection is any form of energy dissipating device that reduces the flow <br />velocity and concentration of runoff in order to reduce scour at stormwater <br />outlets. An effective and economical example of outlet protection is rip -rap. <br />2.3 Stormwater Management <br />Various stormwater control structures will be built during construction of the Project to <br />manage stormwater runoff that may occur once the facility is operating. The most <br />feasible time for these structures to be built depends on the order of construction. The <br />structures that will be built and/or implemented during construction will likely include <br />silt fences, straw bale barriers, ditches and berms, and outlet protection. <br />Discharges from drilling operations are covered under a separate Colorado Department of <br />Public Health and Environment (CDPHE) General Wastewater Disposal Permit. Under <br />this separate permit, the applicant will be responsible for locating and sizing the <br />dewatering settling basins. <br />6 <br />