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Stormwater Permit Annual Report <br />Permittee: Colorado Division of Minerals and Geology <br />Facility Name: Coal Basin Mine Reclamation Construction <br />Mailing Address: 1313 Sherman Street Room 215, Denver Co. 80203 <br />Permit Cert. No.: COR-040204 <br />A. The stormwater permit was issued on November 6, 1998 to the Colorado Division of <br />Minerals and Geology. The permit was issued for the purpose of completing reclamation <br />operations at a portion of the now inactive Coal Basin Mine. The operating permit for the Coal <br />Basin Mine was revoked by the Colorado Mined Land Reclamation Boazd in 1992. Minerals <br />and Geology is accomplishing reclamation of the site with proceeds received via the bankruptcy <br />plan filed by the former permittee. Minerals and Geology is required by statute to accomplish <br />reclamation of this site. <br />Reclamation construction continued until November 11, 1998. At that time, accumulated snow <br />prohibited additional construction. The Best Management Practices contemplated in the <br />stormwater management plan were completed as construction progressed. Best Management <br />Practices installed at each of the three construction azeas is summarized here. <br />Old Refuse Pile Project Area <br />The Huntsman Project was completed neaz the central /western portion of the Old Refuse Pile. <br />Approximately six acres of steep slopes were remediated during the course of this project. The <br />Bear Creek Project will begin in 1999, east of the Huntsman Project Area. Best Management <br />Practices implemented in the Huntsman Project Area included: <br />- After completion of excavation, remaining coal refuse; which formed the base of the remaining <br />slope, was ripped at about a 45 ° angle from horizontal. Topsoil was applied to an average depth <br />of nine inches. The area was fertilized, seeded and mulched at a rate of two tons weed free straw <br />per acre. <br />- Construction of approximately twenty five small dozer basins per acre. These structures aze <br />constructed by a dozer pushing downhill to create a small berm approximately eight to ten inches <br />in height by about ten feet in width. These small basins serve to break up water flows and to <br />contain small amounts of water, allowing some amount of solids to fall out of suspension. <br />- Approximately one thousand feet of silt fence was installed neaz the base of the project azea. <br />- A series of berms and ditches were constructed above the cut slope to divert uphill drainage <br />from the construction area. <br />`~1 <br />