Laserfiche WebLink
indicate that the riser is less than 8' high. Please revise the design <br />based on the actual height of the riser. <br />WFC: <br />a. Map 2.05.3(4) -6 and the SEDCAD runs have been revised to reflect the <br />actual barrel length. <br />b. The intake in the primary spillway riser has an 18" restrictor plate so was <br />modeled as an 18" riser in SEDCAD. The barrel is a 24" CMP and the <br />modeling reflects this. <br />C. Map 2.05.3(4) -6 has been revised to show the outfall of the primary <br />spillway. <br />d. The primary spillway is connected to the county road culvert. However, <br />connection is below ground and the culvert is not fed by any surface runoff <br />water other than that flowing through the primary spillway. <br />e. The SEDCAD designs have been revised to indicate the correct riser <br />height. <br />DRMS: Responses accepted. <br />New Items: <br />9. Revised Map 2.05.3(4) -6 indicates that the inlets to Pond 001 are now or will be <br />CMP structures. The approved design for the inlets is a trapezoidal ditch with a <br />15' bottom width on the east end, and a 12' bottom width on the west end <br />(detailed in Appendix 2.05.3(4) -2 in the SEDCAD runs for Ditch NHN001 East <br />and NHN001West). There is currently no approved design for a culvert in either <br />inlet location. Please submit design information, as required by Rule <br />2.05.3(3)(b), for the two inlet CMPs. <br />Of note, the flume constructed downstream of Pond 001 is outside of the approved <br />permit and disturbed area boundaries for the mine. It is my understanding that the <br />Division and WFC are resolving this issue in a separate permitting action, so I have not <br />commented on this problem. Should you or the operator have questions, please let me <br />know. <br />cc: Sandy Brown <br />Page 3 of 3 <br />