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3 <br />V <br />CIVIL RES"~URCES <br />Erosion Control Measures <br />Erosion control is achieved by redirecting clear water generated from upstream areas, in turn minimizing silt introduced <br />into the downstream wetlands and waterways. Additional erosion control measures, such as silt fencing, is desirable to <br />provide additional control in non-point source runoff areas such as the west side of the mining limits. Riprap and <br />sediment traps are recommended at ditch discharge points, due to the potential for high velocities. Figure 2 and 3 <br />illustrates erosion mitigation measures. <br />Schedule <br />Mining is scheduled to begin in the fall or winter of 2007. As mining progresses the drainage measures should be <br />rerouted or redeveloped to divert water to the areas shown on Figure 2. <br />Summary <br />The measures presented above and on Figures 2 and 3 are standard measures and more effort to control stormwater <br />might have to be implemented as a result of changes in the mining plan or areas of concern as mining progress. Civil <br />Resources believes this plan will control stormwater on the site and prevent erosion and sedimentation of wetlands and <br />waterways downstream. <br />Sincerely, <br />Civil Resourc , LLC <br />Andrew R. odr uez, P.E. <br />Water Resources Engineer <br />attachments <br />J:1SW Investment Group -1231Heit PropertylSWMPIStormwaterManagement Plan.doc <br />