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sediment traps, drop structures, establishment of interim vegetation, vegetative filters, surface roughening, geotextile fabrics and mulch. These methods and structures may be used individually or in combination to effectively control erosion and sedimentation. Stable ' channels and diversions will be used w route surface water runoff safely through or around disturbed areas. Level spreaders, check dams, sedirrrent traps, and drop structures will be used ' as described above under Well Feld (Section 4.5) to enhance the erosion amd sedimentation control capabilities of channels and diversions. Because facility life is expected to be 30 or more years, the establishment of interim vegetation will be emphasized to stabilize and protect disturbances associated with facilities. Interim vegetation will be established on areas where ' operational patterns make this an effective practice. Cultural practices, such as mulching, application of soil amendments or the placement of geotextile fabrics, which enhance seed gemvnation and growth, will be used to facilitate interim revegetation. ' 4.7 INSPECTION AND MAINTENANCE Periodic inspections, monitoring, and routine and corrective maintenance will be performed ' during development, operations and reclamation phases of the project Inspections of disturbed and reclaimed areas will be performed at intervals adjusted to the level of mining and reclamation activity, climatic conditions and environmental conditions that affect the project components being reviewed. Written records of inspections will be kept on file. Prioritized ' cortecKive action plans will be formulated based on inspection of ongoing activities. During inspections particular attention will be paid to the items listed below ' 4.7.1 Erosion And Sediment Control During development of new areas, weekly inspections will be made to ensure that erosion ' wntrol and water treatment structures have been adequately deployed and are functioning properly. Particular attention will be paid to perimeter and other final control and treatment structures. Structure integrity and function will be the primary focus of these inspections. ' During operational phases, inspection frequency will be adjusted according to structure type. Erosion and sediment controls and drainage structures will be inspected in the spring afar snowmelt, with necessary repairs scheduled prior to the summer thunderstorm season. ' Erosion and sediment controls wdl be inspected after significant runoff events. A late summer inspection will be made and amy required maintenance will be performed prior to accumulation of winter snowpack. ' Inspection of erosion and sediment control structures during reclamation will be performed at two levels of intensity. During active reclamation, inspections will occur weekly to ensure that perimeter structures are in place and functioning properly. Weekly inspections will also ' evaluate the adequacy of permanent structures to function properly in support of the postmirting land use. Erosion and sediment control structure construction, modification amd maintenance will be performed accordingly. After restoration work has been completed, but before ' reclaration bonds have been released, inspection frequency will be reduced, with inspections being performed primarily during the early spring and fall and after significant storm events. ParticWar attention will be paid to larger structures that provide erosion or sediment control in watersheds experiencing larger flow volumes. As with the other two operational phases, maintenance will be prioritized and timely performed. Inspections will no longer be required after final revegetation success criteria have been met and the BLM has released reclamation ' liability. ' American soda. LLP. 47 Soil Cottxrvauoo. FJOSIna and Sediment Control, R«latoatroa and Revegcladon Rm ' Oclobcr 28, 1998