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with the post mine land use. Sediment yields will not exceed those of the undisturbed portions of <br />the agricultural field. Due to the limited contributing area, very flat terrain, and vegetation, erosion <br />is not anticipated. If any erosion were to be identified, repairs will be completed as necessary. <br />Repairs may include minor regrading and reseeding of the area. <br /> <br />4.0 Inspection Criteria <br /> <br />Ocular inspections of this 2.3-acre field will be completed during monthly DRMS inspections to <br />confirm the area remains stable and no repairs are needed. In addition, two comprehensive <br />stormwater inspections will be completed annually per the requirements of CDPHE permit <br />CO0049071. <br /> <br />5.0 Performance/Longevity <br />The grass hay vegetation acts as a vegetation filter strip and will prevent substantial increases of <br />stormwater driven sediment yields on this ground. Covering topsoil with permanent vegetation is <br />a long-term solution that will minimize sediment yields from these fields for as many years as the <br />vegetation is present. The grass hay is either grazed by cattle or cut during the harvest period and <br />the field is not left fallow. This field has been producing grass hay for many decades and there is <br />no indication that this will change in the future. The modeling demonstration in Appendix B <br />indicates there will be no appreciable changes in sediment generation in this area, even after a 10- <br />year, 24-hour storm event. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />