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_i Iof that project which adds 58,000 af of yield from a pumpback facility from 1 Blue Mesa Reservoir to Taylor Dark Reservoir was aiso evaluated. The unit � cost of the base project (42,000 af) was determined to be•about b7150 per af I of average yield based on the project capital cost of about 5300 million. The corresponding figure for the lOU,U�O af project variation is 55310 per af. � 8.3.5 Collegiate Range Project � The average annual yield of this project identified in the 1985 report titled Collegiate Range Project prepared by the David E. Fleming Company is 73,000 af. The project configuration and sizing presented in fhat report and in preliminary project drawings supplied by the City of Aurora was reviewed by � the Study Team. An independent cost estimate was then prepared based on that configuration. The total capital cost of the project was estimated to be about $512 million. I 8.3.6 Union Park Project IThis project would divert water from Taylor Park Reservoir into the � proposed Union Park Reservoir located on Lottis Creek, south of Taylor Park Reservoir. The project as proposed by NECQ is intended to supply water to the I Denver Metro area during dry years only. This concept is different from the other alternatives evaluated. In order to evaluate the yield under this dry year delivery concept, an end user must be identified and an integrated system Ioperation study performed. Such a study has not been reported on by NECO but was done by the Corps of Engineers when they evaluated the Union Park Project (Metropolitan Denver Water Supply System EIS, Volume VIII, 1988). The results showed a"safe yield" ranging from 63,000 af to 111,000 af when operated as a � component of the Denver Water Department (DWD) system. The project configuration and sizing of individual features presented in Ithe 1988 report titled Union Park Water Supply Project Reconnaissance Evaluation Study prepared by Ebasco Services, Incorporated, was used by the �