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r <br />4.7.1 Erosion and Sediment Control <br />During development of new areas, weekly inspections will be made to ensure that erosion <br />control and water treatment structures have been adequately deployed and are functioning <br />properly. Particular attention will be paid to perimeter and other final control and treatment <br />structures. Structure integrity and function will be the primary focus of these inspections. <br />During operational phases, inspection frequency will be adjusted according to structure type. <br />Erosion and sediment controls and drainage structures will be inspected in the spring after <br />snowmelt, with necessary repairs scheduled prior to the summer thunderstorm season. <br />Erosion and sediment controls will be inspected after significant runoff events. A late summer <br />inspection will be made and any required maintenance will be performed prior to accumulation <br />of winter snowpack. <br />Inspection of erosion and sediment control structures during reclamation will be performed at <br />two levels of intensity. During active reclamation, inspections will occur weekly to ensure that <br />perimeter structures are in place and functioning properly. Weekly inspections will also <br />evaluate the adequacy of permanent structures to function properly in support of the postmining <br />land use. Erosion and sediment control structure construction, modification and maintenance <br />will be performed accordingly. After restoration work has been completed, but before <br />reclamation bonds have been released, inspection frequency will be reduced, with inspections <br />being performed primarily during the early spring and fall and after significant storm events. <br />Particular attention will be paid to larger structures that provide erosion or sediment contro! in <br />watersheds experiencing larger tlow volumes. As with the other two operational phases, <br />maintenance will be prioritized and timely performed. Inspections will no longer be required <br />once final revegetation success criteria have been met and the BLM has released reclamation <br />liability. <br />4.7.2 Roads <br />During development, inspection of the installation and proper construction of road drainage <br />structures will be perfotmed weekly, or more frequently if warranted. Culvert placement and <br />grade, outlet protection, and adcquate compaction of fill materials will be closely monitored. <br />Particular attention will be paid to perimeter erosion control and sediment structures. <br />Road drainage features will be monitored on a monthly basis during the operational phase of <br />the project. Inspections will pay close attention to the relative stability of concentrated flow <br />structures, drains and outlets. The stability of drainage structures at critical junctions, such as <br />the transitions between disturbed and undisturbed areas, will be given special attention. Dttting <br />all phases road maintenance items will be prioritized and timely performed. <br />4.7.3 Soil Management <br />In the development and reclamation phases, soil monitoring will focus on proper placement of <br />diversions and runoff controls to protect the soil resource and avoid needless losses to erosion. <br />Inspections will be performed weekly or more frequently during salvage and reconswction <br />operations to ensure that erosion and sediment control structures and practices are functional <br />and adequate. The selective handling, storage and replacement of topsoil materials will also be <br />monitored. Special attention will be paid to soil stockpile areas to ensure that erosion control <br />and protection measures are adequate. During the operational phase, stockpile erosion and <br />sediment control monitoring will be performed in the spring and fall and after significant <br />American soda. L.L.P. Q-9 <br />Soil Conservation. Erosion and Sedimem <br />Control. Rcclamvion. and Rcvegnauon Plan <br />October 28. 1998 <br />Revised April 9. 1999 <br />