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("'! .., t"j 'J l:..L I ~} t'Jate. J.\ shuws the computcd power genera- tion at Hoovet power plant and actual storage in Lake Mead as well as the computed power generation and storage absent thc filling of the Colorado Rivcr Storage Project reservoirs. Thc ! 965-66 energy deficiencies at Hoover power plant are shown in Table 10. Table 10 FIRM ENERGY DEFICIENCY AT HOOVER POWER PLANT CAUSED BY FILLING OF CRSP RESERVOIRS Millian, of KW-Hrs 1965-fjlJ Compuud Compuud Pou:tr Powtr Gtntratio1l1 Gtntration1 TfJtal ~1bJtr.t :/.,j/h Computtd Filling Filling D,ficitflcy of CRSJ' of CRSP /)uring .1((umll{ald RtJtrt'oirJ RtstrfJoirJ M07l(h~ Dqfcit7lcy 16803 397 332 65 IH5 336 333 53 \793 352 268 34 1882 275 219 56 1938 268 172 96 2014 286 175 III 2145 290 \04 186 2331 258 182 76 2407 376 324 52 2459 4\0 349 61 2520 417 366 51 257] 358 324 14 2605 391 367 24 2629 421 346 75 2704 350 277 73 2777 Accumulac~d Deficiency as D{ 6-30-65_ un _u July_p p_-.d-. Augusc~_,_u_____ September- _ _ __ _. __ October __ u_. ____ Novembo:r___ ____. December____ January_____~_,___ February____ _ __ __ March__ _ ___~___ ApriLu____ May__ ____ _____ June_._ _________~ J"ly__u__________ AUgU5t_~__ September __ _ __ ___ 1 Computed at 83 percent efficiency in accordance with lilhng crileriJ for Lake Powell adopted Aprd 4, 1961. 2 Delivery of deficiency energy to HoO\'er Allottet"s may follow a dd:krent schedule 'Includes 200 mIllion Kilowatt hOUri 01 '.imp,mment" enerR}'. New Power Developments During 1965-66 considerable progress was made toward increased utilization of thc coal resources in the Colorado River Basin. Two major coal-fired steam generating plants, the Four Corners Power Plant located near Farm- ington, New Mexico and Mohave Power Plant located in Mohave VallC\', Nevada are the first 691731-204 3,67 1M power projeCTS to be undertaken by electric utilities as members of -W' estern Energy Supply and Transmission Associates (WEST Associ- ates). The Four-Corners pro jeer, an addition to the existing 575 -Mw plant of the Arizona Public Servicc Co., will consist of two 755-Mw gen- crating units. Six utilities will participate in ownership of the new units with Southern. California Edison Company owning the largest share. Construction commenced lVlav 1966; the first of the units is scheduled for operation in July 1969 and the sccqnd is expected to be in operation one year later. \Vater for cooling will be pumped from the San Juan River under a New Mexico license to divert up to 5] ,600 acrc- feet annually to the Four Corners power plant cooling pond, of which approximately 38,000 acre-feet will be uscd consumptively. The I,SOO-!Vlw coal-fired i\-!ohave power plant will bc jointly owned by Southern Cali- fornia Edison Company, Nevada Power Com- pany, and Salt River Valley \Vater Users' As- sociation; however Southern California Edison Company will be thc principal owner. The first 750-Mw unit of the plant is expected to be in opcration in 1970 and the second in ] 971. The power plant will consumptively use 30,000 acrc- fect annualh- of Colorado River watcr, which will be charged to Nevada's entitlement. A study made bv the staff of the Board showed th"at current In-basin consumpti,.e use of water of the Colorado River System for thermal power generation is approximately 45,000 acre- feet per year. It is anticipated that during the next 20 years thermal plants having an aggre- gate capacity of 20,000 megawatts will be built to make use of thc vast coal resources in the Colorado River Basin, which according to the staff study would require the consumptive use of an estimated additional 400,000 acre-feet an- nually from the Colorado River system for power purposes. o /'.;lIltJ jll C.^ltFOU<lA OFfICE or STATE r"INTlNG