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<br />~II I~~II~I~~II~~ I~~ <br />sss <br />RECE~vED <br />p,UG 2 2 2001 <br />Division of Minerals and Geology <br />Memo <br />TO: Tim Thulson, Balcomb & Green <br />Steve Wujek, Knight Planning Services <br />David Johnson, Western Ecological Resources <br />FROM: Leslie Hope, High Country Engineering, Inc. <br />DATE: August 20, 2001 <br />RE: :41amm's Creek Gravel Pit -Revisions to Floodplain Study <br />HCE Project No. 2011041.74 <br />Please find the enclosed revised calculations and tables to the Floodplain Study prepazed <br />by High Country Engineering, Inc. (HCE) dated August 3, 2001. These tables <br />incorporate revisions due to extending some of the cross sections in the HECRAS <br />computer runs and matching the Army Corp of Engineers starting water surface <br />elevations. Due to these revised calculations all cross sections show less than aone-foot <br />rise in water surface elevations for the proposed conditions. <br />92J Coops Avenue, l4 hvetn¢5 [hive Fat Suae &144 <br />Glrnwaod Spmgs, CO 81601 ragkwaod. CO 80112 <br />Tckphaie (970) 4458676 -Fax (970)415-2555 Tekpha~e (30J192S-0544 -Fax (30J) 925-0547 <br />