Laserfiche WebLink
C~ <br />• <br />• Re~onse ($A and 36~ These culverts will be replaced by riprapped <br />road crossings as part of the drainage remediation plan proposed for <br />this area in Appendix A, Drainage Design Information. <br />(4A-1 through 4D-1) Inlets to sediment ponds 2, 3, 4, and 5/6. <br />R~eS~onse (4A-1 through 4D-1): Rockcastle plans to remove Ponds <br />2 and 3 and reclaim the associated disturbance areas. Consequently, <br />concerns with respect to inlets 4A-1, 4A-2, 46-1 and 4B-2 are no longer <br />relevant. As stated in the October 18, 1990 letter, the following <br />represent existing conditions and/or planned modifications to Ponds 4, <br />and 5/6: <br />• Pond 4 has two inlets. The southern inlet (CMLRD <br />designation, 4C-1) is a open channel with little or no <br />vegetation. Minor erosion has resulted in establishment of <br />natural armoring. In conjunction with required pond <br />modifications, Rockcastle will regrade and reseed the inlet <br />sideslopes and place additional riprap as necessary to <br />supplement existing natural armoring. The northern inlet <br />(CMLRD designation, 4C-3) is also an open channei. Pit <br />4 backsloping operations will encroach on this inlet. As a <br />result, the north inlet will be relocated and reconstructed as <br />shown by the Pond 4 Design Map, (Map R-3). <br />• Pond 5/6 has two inlets, a vegetated channel (CMLRD <br />designation 4D-1) which enters at the southwest corner, <br />and a 24-inch culvert which discharges at the northeast <br />corner. Rockcastle proposes to regrade the south <br />embankment to approximately a 5H:1 V slope and to riprap <br />the south inlet. In addition, the culvert will be removed and <br />replaced by a riprapped road crossing and inlet channel. <br />Both inlet modifications are shown by the Pond 5/6 Design <br />Map, (Map R-4). <br />-9- <br />