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Mr. Berhan Keffelew <br /> Mined Land Reclamation Division <br /> January 30, 1992 <br /> Page 2 <br /> The riprap will be placed along the full side slope for the <br /> distance of each bend and for twenty feet downstream of each bend. <br /> The riprap blanket will be 18 inches thick. <br /> Also attached with this letter is a copy of the Mannings Equation <br /> spreadsheet used to determine the configuration of the new channel. <br /> The existing channel upstream and downstream of the proposed <br /> channel is approximately three to four feet deep and ten feet wide <br /> across the bottom, roughly the same as the new channel. <br /> If there are additional questions please give us a call. <br /> Cordially, <br /> TUTTLE APPLEGATE, INC. <br /> Dave Jones <br /> DJ/cr <br /> Encs. <br /> cc: File #91-156B <br /> Bill Kobobel <br />