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WALKWAY CULVERT DESIGN <br />r~ <br />U <br />During midterm review of [his permit, the Division requested a design be submitted for an existing, unnamed <br />culvert that is located under the conveyor belt between the crusher building and the conical stack tube near [he <br />sump pump, see Exhibit 12-2, Surface Water Control Map. This culvert actually lays in Ditch 3 and acts as a <br />wa0.way to cross the ditch and get [o the sump pump. The existing culvert has a 12-inch diameter and is 7 feet <br />long. The culvert in question also allows for runofl'in Ditch 3 to flow through it and continue to designed culvert <br />LFC-2, which is immediately downgradient. Culvert LFC-2 is also 12-inches in diameter and the design <br />information for is contained in Appendix 12-4. Therefore, the design parameters for culvert LFC-2 can apply <br />to the wallway culvert. Since both culverts are the same size, the wallavay culvert should not restrict the design <br />flow of ditch 3, that the performance of the ditch has not been compromised by the cuh~ert, and the culvert is <br />adequately sized. <br />u <br />• 'T2-o 2 <br />Su6M~T-(,yL D/oTe Iz/t7 ~96 <br />