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NEWSLETTER NO.2 JANUARY 1982 r;;;~. /""'" - '0' . C,.~ ./.> //{if!fiJr:--.. ~- /I/I? '--),/S.}f)..... /(/1 c.;J'/ "7)~ I~~ ....1 "0. ""~] '- 'f", ~....., .;~ " ',., 'I .. . ~ ), .. " ('!. 1...,,': ~'I.(.)'i;.,. ~ G,? i . ..^. 'T1-10.O f '-<r;ir. I. ". :r"Cl W47"~ .1..11.,.., ..tr "'O,q,o !) Diamond Fork Power System Bonneville Unit Central Utah Project WHY BUILD THE DIAMOND FORK POWER SYSTEM? Newsletter No.1 contained a discussion of the purpose of Diamond Fork Power System and its relationship to other units of the Central Utah Project. By way of a brief review, the power system consists of that segment of the Bonneville Unit extending from the eniarged Strawberry Reservoir to near the confluence of Diamond Fork and Spanish Fork Rivers. Various alternatives consisting of reservoirs, tunnels, pipelines, and powerplants of differing sizes and locations are being considered. The Diamond Fork Power System will function as the final link in the transbasin diversion, which will convey water from the Uinta Basin through the Strawberry Aqueduct and Col- lection System, down the Diamond Fork and SpaniSh Fork Rivers drainage to the Bonneville Basin. The project water supply of about 136,000 acre-feet, coupled with the 61,000 acre-feet of present yield from the existing Strawberry Valley Project. would result in an annual volume of 197,000 acre- feet released through the system and made avaiiabie to the populated areas of the Wasatch Front for municipal. indust- rial, and agricultural uses. In addition to the increase in usable water supplies men- tioned above, the Diamond Fork Power System will develop the hydroelectric power potential of the diverted Uinta Basin water and existing Strawberry Valley Project water by utiliz- ing the 2,600-foot elevation difference between Strawberry Reservoir and Spanish Fork River. Energy generated by the power system would be marketed throughout the Colorado River Storage Project (CRSP) System. Several atternative plans are being considered at this time and are briefly described in this newsletter. DIAMOND FORK POWER SVSTEM ALTERNATtVES Three different alternatives are being investigated for the Diamond Fork Power System. They are known as the Sixth Water Flow Through Plan, Sixth Water Pumped Storage Plan, and Fifth Water Pumped Storage Plan. The alternatives are similar in that each transports 197,600 acre-feet of water annually from the enlarged Strawberry Reservoir through a series of tunnels, pipelines, and reservoirs to the Wasatch Aqueduct and Spanish Fork River near the confluence of the Diamond Fork and Spanish Fork Rivers. These alternatives differ in the number, size, and location of the dams, tunnels, powerplants, and other features. The three alternatives also differ in their projected costs and benefits. While hydro- power generation is a part of each plan, the Sixth Water Flow Through Plan has no pumped storage capability.