·rRlNITY ~IVER BASIN us RESOURCE LIBRARY BR TRINITY COUNTY LIBRARY T7 WEAVERVILLE, CALIFORNIA 1979 (c.l) Trinity Dam Operating Criteria Trinity River Division Central Valley Project-California TRINITY COUNTY JULY 1979 TRINITY RIVER BASIN RESOURC E LIBRARY TRINITY RIVER DIVISION CENTRAL VALLEY PROJECT CALIFORNIA Trinity Dam Operating Criteria Prepared for the Trinity River Basin Fish and Wildlife Task Force July 1979 United States Department of the Interior Bureau of Reclamation Mid-Pacific Region 1 ~ 7 5 122 R 1 W R 1 E 2 23° \ R 10 W ( T 38 N ----- ·-----]r------------r-CANADA ' I • I WA r NORTH ~ J SHINGTON ' \ ' DAKOTA ) ___ 1 • \.-.. ..-- .. J, ': M 0 N TAN A !___ - ----\ ' \ souTH : i ,----- - ~ ~~ ,o. 0 R EGON ( ,_---, : DAKOTA I : IOAHo 1 I __ __ \ \~' I W YOMING ·----- ~ -- -----, ___ , ,I \ ~ ~u I ~ 0 ; ------1 , NEBRASKA ', 1\ ~ I I ·--------'--, ~ I NEVA 1' 1: 0 ~1 : t------- -'.) I I J \_ DA UTAH COLORADO: ANSAS ' ~,J t -+- ---1--- .. - ', : : I K .\ ~ I . ---- .... ~ ' I 4!< l o ' ------·------ -- -~----- ', ~ -r' "::: rJ A ~ '!> ','\_r) i t---! OKLAHOMA\ -:- . I , , r/ / ;' ARIZONA I' NEW MEXICO. L ______ 1_ MALIN-ROUND MOUNTAIN 500 KV ~ . ' ,... 36 : , I l PACIFIC NW-PAC/FIC SW INTERTIE ---, ' ' ', I, ---~-E~~'-;:--·;;::<_-'r EX A_(S ---i- - ~ ~ - t \. .. _;··-....., ~ CLAIR ENGLE LAKE IN 0 EX M A P '._\_ ~.:.. (__j ~ ) I I / \ I - BUREAU OF RECLAMATION HASTAL~l WHISKEYTOWN-SHASTA( rr TRINITY [NAT . lj r COMPLETED OR AUTHORIZED WORKS 34 TRINITY DAM & POWERP~LANT~- ? ) RECrATION AREAS (~ ,- DAM AND RESERVOIR LEWISTON LAKE TRIINir/cARR 230 KV ? 0 I <=::? r ~-~~- _./ TUNNEL ~<";:1 r ~ -+ ---< - .r') d,):3_ -}N , ··- •J?:y,--.___ N CONDUIT - ~~ wcAv~~VIL' 7 __r~\. ,'}.,<"~ __j r -,. ---w------ TRANSMISSION LINE L -- I TRINITY RIVER FISH HATCHERY _,.~LEWISTON DAM & POWERPLANT ; ... PUMPING PLANT ,rv ~ J ( • POWERPLANT CLEAR CREEK TUNNEL~ SPRING CR DEBRIS .DAM\ SUBSTATION '""' \ SPRING CR TUNNEL I ~ FISH HATCHERY ~ ~ · & POWERPLANT ,_ I • -----..,- L, ' ---- CENTRAL VALLEY BASIN BOUNDARY ' --' . 'I ---- WATER SERVICE AREA JUDGE FRANCIS CARR POY(~RHO~ ';_) ~ l}:- t 32 WHISKEYTOWN LAKE~ .. I I ROUND MOUNTAIN-COTTONWOOD 230 KV CARR-KESWICK NO 1 & 2 230 KV \ PACIFIC NW-PACIFIC SW INTERTIE WHISKEYTOWN DAM J ~ ~ - _ ___._ j r- SPRING CR-KESWICK 230 KV UNITED STATES r \\ r 1__ DEPARTMENT OF THE INTERIOR 1 SHASTA-COTTONWOOD 230 r' ) r tt r- BUREAU OF RECLAMATION 0° 30' 40' 30' ,J ~ - CENTRAL VALLEY PROJECT SHASTA AND TRINITY RIVER (/_/ 2 230 KV DIVISIONS SHASTA- TRACY 230 K"·-- ----- --<--; ...---- - .v---- - ___.,--- / ~ T 30 ~ CALIFORNIA + +- MID-PACIFIC REGION MAP NO. 214-208-4469 MILES 0 5 10 15 ,. 0 5 10 15 20 r\ ]\ }\ KILOMET RES ' 123' FEBRUARY 1977 I ... FACTUAL DATA ON THE SHASTA AND TRINITY RIVER DIVISIONS T R N T T A The Central Valley Project was authorized for construc­ Trinity River water is combined with Sacramento River tion in 1935. Shasta Dam, a part of Shasta Division, was one water to provide irrigation service to lands in Shasta of the initial features included in the project. The Trinity County, to meet the ultimate requirements of the Sac­ River Division was authorized by Congress in 1955 and com­ ramento Canals, and to help supply water to lands in the pleted in 1964. Delta-Mendota Canal service area, the San Luis Unit, and other areas of the Central Valley Project. TRINITY DAM AND CLAIR ENGLE LAKE on the Trinity River have a drainage area of over 1 885 km2 (728 sq. SHASTA DIVISION miles) of mountainous country and store a maximum of SHASTA DAM AND SHASTA LAKE on the Sac­ 3 019 000 000 m3 (2,448,000 acre-feet) of water. Flows are ramento River have a drainage area of 17 262 km2 (6,665 sq. regulated and surplus water is stored for irrigation. The dam miles) and store a maximum of 5 614 810 x 103m3 (4,552,000 is an earthfill structure 164 m (538 ft.) high with a crest acre-feet) of water. Floods are controlled and surplus winter length of 746.8 m (2,450 ft.) runoff is stored for many uses including: irrigation in the Sacramento and San Joaquin Valleys, maintenance of navi­ TRINITY POWERPLANT at Trinity Dam has two gation flows in the Sacramento River, conservation of fish generators with a capacity of 105,600 kW. life in the Sacramento River, protection of the Sacramento­ LEWISTON DAM AND LAKE, about 11.3 km (7 miles) San Joaquin Delta from intrusion of saline ocean water, pro­ downstream from Trinity Dam, creates an afterbay to Trin­ Shasta Dam vision of water for municipal and industrial use, and genera­ ity Powerplant and diverts water by means by Clear Creek tion of hydroelectric energy. The dam is a curved concrete Tunnel to Whiskeytown Lake. Lewiston Dam is an earthfill ( gravity structure, with a height of 183.5 m (602 ft.) and a structure 27.7 m (91 ft.) high and 219 m (720 ft.) long, form­ Spring Creek Tunnel crest length of 1 054.6 m (3,460 ft.). ing a reservoir capacity of 18 100 000 m3 (14,600 acre-feet). SHASTA POWERPLANT is located just below Shasta LEWISTON POWERPLANT, using releases for the Spring CreekI Debris Dam Dam. Water from the dam is released through five 4.6-m­ support of fish life and other downstream purposes in the I .,/' SPRING CREEK DEBRIS DAM AND RESERVOIR. Keswick Dam Vista Conduit diameter (15-ft.-) penstocks leading to the five main generat­ Trinity River, has one station unit with a capacity of350 kW. .,.....,..,.,......~Bella The dam is an earthfill structure 59.7 m (196ft.) high, with a ...... ing units and two station service units. The total capacity of TRINITY RIVER FISH HATCHERY. The Trinity crest length of347.5 m (1,140 ft.), located on Spring Creek Pumping Plant these units is 456,000 kW. River is one of California's most famous fishing streams. To above the powerplant tailrace. The reservoir, with a capac­ KESWICK DAM AND POWERPLANT are located on maintain the salmon and the steelhead fisheries below ity of 7 240 000 m3 (5,870 acre-feet), controls debris which the Sacramento River 14.5 km (9 miles) downstream from Lewiston Dam, 4.3 m3 /s (150 ft3/s) of water is released be­ Whiskeytown Conduit would otherwise enter the powerplant tailrace, and provides Shasta Dam. The dam creates a 29 357 OOO-m3 (23,800-acre­ tween December 1 and August 30 of each year. Releases are important fishery benefits by controlling contaminated foot) afterbay for Shasta Lake and Trinity River Division increased to 5. 7 m3 /s (200 ft3/s) during the period of Sep­ runoff resulting from old mine tailings on Spring Creek. and smooths out the uneven water releases from the power­ tember 1 to October 14, and to 7.1 m3 /s (200 ft3 /s) October 15 plants. The dam also has migratory fish trapping facilities to November 14. Releases for the period November 15 to COW CREEK UNIT, located in Shasta County, was au­ operating in conjunction with the Coleman Fish Hatchery on November 30 are set at 5. 7 m3 /s (200 ft3/s). The higher re­ thorized as a part of the Trinity River Division in 1955. The Battle Creek 40.2 km (25 miles) downstream. Keswick Dam leases in the fall facilitate natural spawning. The Trinity unit features consist of Wintu Pumping Plant with a is a concrete gravity structure 48.5 m (157ft.) high with a River Fish Hatchery, with a capacity of about 40,000,000 maximum capacity of2.8 m3 /s (100 ft3 /s), 2.6 m3 /s (92 ft3 /s) crest length of 318.8 m (1,046 ft.). The powerplant has three eggs, is located immediately downstream from Lewiston through the main conveyance, and a pressure system with generating units with a total capacity of 75,000 kW. Dam and compensates for upstream spawning area rendered branching pressure distribution lines. Each year about 8 370 inaccessible and unusable by the dams. 000 m3 (23,000 acre-feet) of water can be lifted 90 m (295ft.) from the Sacramento River by the Wintu Pumping Plant into RECREATION. The Whiskeytown-Shasta-Trinity Na­ CENTRAL VALLEY PROJECT MAPS TRINITY RIVER DIVISION CLEAR CREEK TUNNEL, 5:33 m (17.5 ft.) in diame­ the 12. 9-km-long (8-mile-) Bella Vista Conduit. This supple­ tional Recreation Area is administered by the United States ter and 17.4 km (10.8 miles) long, enables transfer of water Surplus water from the Trinity River Basin is stored, mental supply, in combination with local ground water, will Forest Service. Boating, fishing, swimming, water skiing, from Lewiston Dam to the Judge Francis Carr Powerhouse regulated, and diverted through a system of dams, reser­ serve about 2 800 ha (6,800 acres) of irrigable land east of camping, hunting, and sightseeing are enjoyed by nearly a and Whiskeytown Lake. A bypass is provided into Crystal Central Valley Project voirs, tunnels, and powerplants into the Sacramento River 1 Redding. million tourists every year. Many resorts cater to the needs for use in water-deficient areas of the Central Valley Basin. Creek. of the visitors to the area. Map No. 214-208-5133 ' CLEAR CREEK SOUTH UNIT, located in Shasta Additional power generating capacity is also provided for JUDGE FRANCIS CARR POWERHOUSE, located Central Valley Project, North Half County, was authorized as a part of the Trinity River Divi­ northern and central California. In addition, Trinity River on Clear Creek, has two generators with a capacity of sion. The major feature is the 18.8-km-long (11. 7-mile-) OTHER PROJECT FEATURES Map No. 214-208-4174 Division improves recreational opportunities and increases 141,444 kW.