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<br />t and recycled within the project area. Then they will be graded, topdressed and revegetated to <br />support the postmining land use. Culverts and other structures that are no longer required for <br />' drainage will be removed and reused on future development or disposed of accordingly if they <br />are damaged. <br />' Inspection and maintenance of road drainage features will be performed periodically and <br />following significant runoff events to idemtify and correct problem areas. Maintenance and <br />repair work will be prioritized and performed im a timely, woricmranlike manner. Problem or <br />maintenance areas which present the greatest risk of erosion or sedimentation will restive <br />' higher scheduling priorities. <br />4.5 WELL FIELD (MINING PANELS) <br />' The well field will be disturbed for well pad development and associated pumping facilities, <br />collection pipelines, utilities and access roads. The sequence of activities nomrally occurring <br />' during mining panel development is as follows: <br />' 1) Erosion and sedimentation control measures will be implemented; <br />2) Soil resource salvage operations will be conducted; and <br />' 3) Access roads, well pads and associated support facilities will be constructed and interim <br />erosion and sediment controls will be implemented. <br />' This sequence of operations will cycle across the well field as mining panels are developed and <br />retired Retirement and reclamation of mining panels is discussed in the Reclamation Section <br />5.0 of this document During all phases of project development and operation, appropriate <br />' erosion and sediment control measures will be constructed and maintained. <br />The principal BMPs that will be used during well field operation include silt fencing, channels <br />' and diversions, level spreaders, check dams, sediment traps, drop structures, water bars <br />establishment of interim vegetation, vegetative filters, surface roughening, geottxtile fabrics <br />and mulching. These methods and structures may be used individually or in combination to <br />effectively control erosion and sedimentation. <br />' Silt fencing will be placed as a temporary perimeter erosion and sedimentation control while <br />solution wells are developed and placed into operation. Silt fencing will be used to twat water <br />' from disturbance associated with the constmction of well pads, access roads, solution collector <br />pipes and pumping stations. When concentrated drainages are encountered, diversions will be <br />used to route runoff around the disturbed area. When it is not feasible to divert flows, runoff <br />will be routed through disturbed areas via properly designed and constructed channels. Check <br />' dams with pervious outlets may be used to release water from disturbed area diversions, <br />channels and silt fences. Channel linings will be provided as needed based upon flow <br />velocities to ensure diversions and channels are erosionally stable and to prevent excessive <br />' sedimentation. <br />Level spreaders may be placed at the outlets of minor diversions, channels and road ditches to <br />' disperse concentrated flows and provide irrigation for downslope vegetation. Level spreaders <br />will work best for structures that are expected to carry 10 cfs or less. [n moderately sized <br />channels it may be necessary to use sediment traps and drop structures to control erosion and <br />' nmp;cm soda, l~P. 45 <br /> Soil Coosetvation. Fiosion and Sedimcm <br /> Cootml, Ralamatiaa and Revegetadoo Rm <br />' October 28, 1998 <br />