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<br />Mr. Mark Klune <br />WRC File: 1664/2 <br />Page 4 <br />WRC wants to caution Valco, Inc. that during a storm event exceeding the <br />10-year return storm, it is likely that the mining operations will be flooded <br />and subsequently maintenance work will be required on the diversion ditches. <br />Should Valco, Inc. decide to pursue these alternatives and additional <br />engineering is required, WRC will be pleased to present a proposal for such <br />engineering services. <br />We appreciate the opportunity to continue to provide engineering services <br />to Valco, Inc. Should you have any questions or wish to discuss the contents <br />of this letter, please call. <br />Sincerely, <br />WRC ENGINEERING, INC. <br /> <br />Dennis L. Heller, P.E. <br />Senior Project Engineer <br />DLH/jed <br />Attachments <br />