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Keffelew, Berhan <br />To: pbarnesC~3AngIoGOLDNA.COM <br />Cc: Stevens, Jim <br />Subject: PHASE IVb/PHASE IV C TEMPORARY DIVERSION CHANNEL SIZING. <br />Dear Mr.. Barnes: <br />The Division of Minerals and Geology has reviewed the temporary channel sizing design for phase IVb and Phase IVc, <br />Valley Heap Leach areas. These channels will be replaced by a permanent diversion channel, for 100 years 24 hours <br />storm event, upon the construction of the Phase IVc Valley Leach Facility. The temporary diversion channels are <br />proposed to be designed for the 25 years 24 hours event and appear to be adequate. However, a plunge pool type design <br />would require frequent maintenance and as usual, CC&V will need to inspect these areas after a measurable precipitation <br />event. With that in mind, the Division accepts the temporary channel designs submitted on 5-7-02. <br />If you have questions additional questions, please contact me at 303- 866-4072 <br />Sincerely, <br />Berhan Keffelew <br />Reclamation Specialist <br />