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<br />PLn[aSMA1~ER INnUfTlllt:ti, ING <br />Oeobpy. Qrarriee end Lend Marg7emmd <br />6i Mew Sveei <br />Pmcta. ~rmOnl 05]65 <br />USA <br />TN. 18021 a54331i <br />Fax' IB07) <54210< <br />Received <br />May 6, 1999 <br />Mr. Rex E. Loesby Jul ~ 2 1999 <br />Siena Minerals Corporation /~~~ ~ <br />Englewoodd, Co orado 801 I~0 "~e]81pq o ~rlerl ~ & Gep%9Y <br />RE: Sierra Minerals Corporation Yule Quarry Permit Application <br />Dear Rex: <br />OMYA, Inc, has reviewed Sierra Minerals Corporation's permit application being submitted to <br />the Colorado Division of Minerals and Geology. We note that the portal access road has been <br />excluded from the proposed effected area. OMYA approves of the proposed exclusion and <br />roquests that the portal access road remain open after Sierra ceases permitted mining operations <br />so that access will be available, if required, for future mining operations on the OMYA, Lic. <br />property. <br />We appreciate you continuing to keep us informed of your progress with permitting Sierra's <br />proposed quarry operation. <br />Sincerely, <br />Doa Burns <br />(c) Water Resources: The affected area drains exclusively into Yule Creek. Yule <br />Creek joins the Crystal River near the town of Marble approximately 2.5 miles north of the <br />quazry. The closest standing water is located at beaver ponds approximately I mile north of the <br />quarry. In the area near the quarry, Yule Creek is a rapidly falling high mountain stream. It <br />drops approximately 600 feet from the southern end of the New Discovery claim to the northern <br />end of the White Marble claim Yule Creek, where it joins the Crystal River at Marble, is <br />estimated to have a mean flow of42 and 76 cubic feet per second during May and June <br />respectively. <br />12 <br />