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<br />03/27/1995 13:11 <br /> <br />7192753051 <br /> <br />~D <br />MAR 2 7185 <br /> <br />PAGE 01 <br /> <br />... <br /> <br />r <br /> <br />'~r tw.o <br />'_ ... -ea.d <br /> <br /><l' <br /> <br />GE I Consultants, Inc. <br /> <br />February 6, 1995 <br />Proposal No. P8245 <br /> <br />5660 Green1l/l'Kld Plaza Blvd. <br />Suite 202 <br />Enj;lew\'Xx!, CO 80111.. 2418 <br />303.779.5565 <br /> <br />Ms. Honey R. Moschetti, President <br />DeWeese-Dye Ditch and Reservoir Company <br />1320 Orand Avenue <br />Canon City, CO 81212 <br /> <br />Subject: <br /> <br />Proposal for Engineering Services for HydrOlogic Analyses of DeWeese Dam, <br />near Westcliff, Colorado. <br /> <br />Dear Ms. Moschetti: <br /> <br />GEl Consultants, Inc. is pleased to submit this proposal for performing hydrologic analyses of <br />DeWeese Dam. Our proposal is based on the recommendations presented in our December 19, <br />1994 Safety Evaluation Report, and on subsequent conversations with you. The objective Qf this <br />study is to detennine an appropriate inflow design flood (IOF) for use in developing dam safety <br />remediation measures at DeWeese Dam. and to secure the approval of the inflow design flood <br />by the Colorado State Engjneer's Office (SEO). The inflow design flood is an important element <br />in the development of remediation measures necessary to satisfy dam safety concerns identified <br />by the SEO. By applying the concept of the incremental damage analysis to determine the IOF, <br />the maximum flood event for which any dam repairs must be designed can be minimized. <br /> <br />SUMMARY OF. APPllCABLE SEO REGULATIONS <br /> <br />The SEO defines DeWeese Dam as an Intermediate-size. Class n dam. Current SEO dam safety <br />regulations require that Intermediate Class II dams must be capable of safely passing an inflow <br />flood generated by SO percent of the Probable Maximum Precipitation (PMP).. A lesser flood can <br />be used as the IDF where an incremental damage analysis (IDA) shows that the darn failure flood <br />resulting from an inflow flood higher than the IDF would cause no expected additional loss of <br />life and would not cause significant incremental flood damages downstream from the dam. <br />According to state dam safety regulations, no additional loss of life or "significant" damage is <br />expected if the incremental increased depth of flow resulting from dam failure is two feet or less, <br />and if the product of the average floodplain flow velocity (in feet per second) and the incremental <br />depth of flood (in feet) is less than seven. <br /> <br />SCOPE OF WORK . <br /> <br />OUf proposed scope of work for the hydrologic analyses consists of the six work tasks described <br />in the following paragraphs. We have reviewed this scope of work with Mr. Michael Graber. <br />P.E. of the SEO in Pueblo. Mr. Graber has indicated to uS that the methods and procedures <br /> <br />PUCSlPllOI'OSAL.IDA <br /> <br />_ " J'-"Il <br /> <br />f....;~."... 11 <br />