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4.6 SURFACE FACILITIES <br />Development, operation and reclamation of the facilities azeas will proceed in the same general <br />sequence described above for the well field. There will be differences between the Piceance <br />and Parachute facility locations due to differing amounts of past disturbance. The Parachute <br />facility has very little if any soil materials available for salvage. Soil was previously salvaged <br />and stockpiled at the site during previous development activities performed by Unocal. If <br />additional area is disturbed that contains suitable topdressing materials, it will be placed in these <br />existing stockpiles. Development of new disturbance area at the Parachute Site will begin with <br />the establishment of erosion and sediment controls. Since little or no additional disturbance is <br />initially expected, establishing erosion and sediment controls will primarily involve <br />maintenance or repair of existing structures and practices. Some replacement or new structures <br />may be required, but overall the amount of erosion and sediment control work expected for this <br />site is minimal. Qrrce operational, the site is expected to remain static, with little or no <br />additional future disturbance. During the life of the facilities routine inspection and <br />maintenance or replacement of erosion and sediment controls will be performed. <br />A site-specific reclamation plan for the Parachute Site facility will be developed well in advance <br />of final closure. However, preparing such a plan at this time is premature. For instance, <br />future disturbance may create opportunities to salvage additional soil materials for topdressing <br />previously disturbed azeas where soil was not stockpiled. Also, since the minimum Yankee <br />Gulch Project life is estimated to be thirty years, it is impossible to determine what the adjacent <br />postmining land uses will be and how best to reclaim the facilities area to enhance adjacent <br />property values and compliment their uses. When the final reclamation plan is prepared it will <br />follow the general sequence detailed above. <br />The principal BMPs that will be used to control erosion and sedimentation for the two <br />operating facility locations include channels and diversions, level spreaders, check dams, <br />sediment traps, drop swctures, establishment of interim vegetation, vegetative filters, surface <br />roughening, geotextile fabrics and mulch. These methods and structures may be used <br />individually or in combination to effectively control erosion and sedimentation. Stable <br />channels and diversions will be used to route surface water runoff safely through or around <br />disturbed areas. Level spreaders, check dams, sediment traps, and drop structures will be used <br />as described above under Well Field (Section 4.5) to enhance the erosion and sedimentation <br />control capabilities of channels and diversions. Because facility life is e:pected to be 30 or <br />more years, the establishment of interim vegetation will be emphasized to stabilize and protect <br />disturbances associated with facilities. Interim vegetation will be established on azeas where <br />operational patterns make this an effective practice. Culttual practices, such as mulching, <br />application of soil amendments or the placement of geotextile fabrics, which enhance seed <br />germination and growth, will be used to facilitate interim revegetation. <br />4.7 INSPECTION AND MAINTENANCE <br />Periodic inspections, monitoring, and routine and corrective maintetrance will be performed <br />during development, operations and reclamation phases of the project. InsFrctions of disturbed <br />and reclaimed areas will be performed at intervals adjusted to the ]c:vel of mining and <br />reclamation activity, climatic conditions and environmental conditions thaz affect the project <br />components being reviewed. Written records of inspections will be kept on file. Prioritized <br />corrective action plans will be formulated based on inspection of ongoin;; activities. During <br />inspections particulaz attention will be paid to the items listed below. <br />AmeriUn Soda. Li.P. 4-$ <br />Soil Conservation &osion and Seditra:n[ <br />Contml, Reelamanan, and RevegeLVion Plan <br />October 28. 1998 <br />Revised Apn1 9, 1999 <br />