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Alternatives PrelfNfnary fndfCa0 are that: - Trimble Point would require the shortest penstocki Campbell the longest. Dunhall Point and Hoppe' Point penstock 1 engths are about the sue. - The shorter penstock costs for Trf_ble Point would be offset by the larger embankment costs. The embanlalent costs for the other three sites are approximately the SIIlIe. Access for operation and m.intenance of the powerplant in a" four cases is under study. One option is the construction of a new DIM road (to be used by goverment personnel only). approxfllltely 1 and 1/2 mfles long from McPhee DIlIl. tying into the Dry Canyon Road. Some improvements of existing roads would be required for all four sites. We are looking at less conventiona' routes of access. such as an aerial tramway. In order to select a reconnended plan 1n March of 1982. the Planning Team will be evaluating these sites in relation to cost-effectiveness. wildlife, fishery resource and recreation- al considerations. as they affect McPhee Reservoir. Studies are ongoing to gather the necessa~ infonnatfon to make these decisions. , A$l;~, \,.1' i.i_~ . ,'-,f-.; Four alternate forebay sites have been identified for further investigation by the Planning Team. They are Hoppe Point. Dunha. Point. TriMble Point and Campbell. as shown on the map below. Sites other than the higher mesas on the north s1.de of McPhee Dan! require larger volwnes of water to be pumped to achieve the ~ generating capacity as the north Mesa sftes; therefore. the forebay alernatfves were limited to north and northeast of McPhee DaM. Dne of the decisions to be made by the Planning Team will be to identify the appropriate size of tl1e unit. The likely size would be from 500 to 1.000 megawatts (MW). The following table WlS based on a 1,000 MW sfze. Please note that the ffg- ures shown are all approximations for planning purposes. Approx Elevation App rox Locat 1 on Ahove McPhee Res Capacity Area From McPhee Dam Water Surface (Acre-Feet) (Acres) Hoppe Poi nt 1 mile due north 1 .000 feet 16,000 280 Dunham Poi nt 2 miles HE 1.100 feet 15,000 350 Trimble Point 3 mil es east 900 feet 16,000 200 COlllpbell 4 miles Nt: 1.100 feet 400 LEGEND Existing Road ___ New Road IImproved Road--- - Tunnel.