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Page 1 of 1 <br />Hernandez, Daniel <br />From: Hernandez, Daniel <br />Sent: Wednesday, November 28, 2007 4:03 PM <br />To: 'bheesen@wwcengineering.com' <br />Cc: 'tsummers@wwcengineering.com' <br />Subject: Edna Minor Revision MR-53 Adequacy Comments <br />Hi, Beth - <br />Here are my adequacy issues. A formal letter is forthcoming. <br />1. Please provide the information required by Rules 2.05.5(1)(a)(iii) and 2.05.5( requiring comments from <br />surface owners and State and local agencies regarding the proposed retention of he West Ridge Diversion Ditch. <br />2. With regard to my concern as to whether the West Ridge Diversion Ditch is currently designed to safely pass <br />the peak runoff from a 10-year, 24-hour storm event as required by Rule 4.05.3(3), you directed me over the <br />phone today to Page 4.6-96 of the Edna Mine permit. This page states that the West Ridge Diversion Ditch "was <br />designed to route inflow due to a 10-year, 24-hour storm and pumping from the pits from West Ridge drainage <br />area into the (West Ridge) sediment pond". This page references two Exhibits and two Tables in the Edna <br />permit. I will review those Exhibits and Tables tomorrow and verify the designs. Thanks. <br />At this point, I have no other adequacy concerns. <br />Sincerely, <br />Dan <br />11/29/2007