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<br />.. <br /> <br />'. <br /> <br />003191 <br /> <br />reservoirs and combinations of reservoirs on instream flows In downstream <br />areas. <br /> <br />TASK 4.C--PROJECT ELEMENT YIELD ANALYSES <br /> <br />Purpose <br /> <br />The purpose of this task is to evaluate the capability of potential reservoir sites to meet <br />the identified municipal, industrial, and agricultural demand levels. The evaluations will <br />factor into the screening of potential project elements and combinations of reservoir <br />sites in Task 5.F. <br /> <br />Responsibility <br /> <br />LRCWE will be responsible for this task. <br /> <br />Approach <br /> <br />The project team will undertake the following activities: <br /> <br />1. Estimate evaporation and seepage losses using generalized curves prepared from <br />meteorological station records and regional geologic/soils maps for the Yampa <br />River basin. <br /> <br />2. Develop a computerized mass diagram approach to yield analysis for 10 poten- <br />tial reservoirs and 5 combinations of reservoirs in the study area. <br /> <br />3. At each of the 10 potential reservoir sites and 5 combinations of reservoirs, <br />calculate the storable flow estimates and using the municipal, industrial, and <br />agricultural demands, estimate the yields of the project elements. Curves of finD <br />yield versus various storable flow and reservoir capacity values will be generated. <br /> <br />4. Perform a yield analysis and generate a yield versus reservoir capacity curve for <br />the five project element combinations for which storable flow was determined. <br /> <br />5. Make and document a recommendation on the five individual reservoir sites and <br />three combination projects that appear to best meet the municipal, industrial, <br />and irrigation demands and have the least impact on the in stream flows. The <br />activity will be conducted jointly \\~th CH2M HILL and CH2M HILL will be <br />responsible for presenting these concepts to the TSC at the meeting identified in <br />Task 4.C.6. <br /> <br />6. Present findings to the TSC, resolve any differences in interpretation and finalize <br />a report to be submitted to CH2M HILL. <br /> <br />16 <br /> <br />DENI800P/033.S1 <br />