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. PROJECT DATA Land Areas (1977) lrrigable area: Full irrigation service. . . . . . . . . . . . . . . . . . . . . Supplemental irrigation service. . . . . . . . . . . . . Total..... ............ .........',.. .... Number of irrigated farms/ parcels (5 acres or more) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Area Irrigated and Crop Value Grand Valley Project 33.368 Here, 8.580 acres 41.948 acre6 1.089 Year Area irri/Z"sted, acres Crop value, dollar~ 1%8 1%9 1970 1971 1972 1973 1974 1975 1976 1977 33.735 32.871 31.511 31.505 31,628 31.875 31.300 32.569 31.961 31.666 7.845.019 i.622.43B 6.932.635 7.618.315 i .067 .877 11.952.125 15.048.138 13.115.629 11.660.152 11.733.366 Facilities in Operation Diversion darns..... ..................... Canals............................... .. Laterals ...........;,................... Pumping plants.......................... Drains ................................. Powerplants1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . ILeased to Public Service Co. of Colorado lor operation. Climatic Conditions Annual precipitation;.................... Temperature: Maximum..........................;.. . Minimum ........... ......... ...... .... Mean .................................. Growing season .......................... Elevation of irrigable area................. Settlement Number 01 persons served with project water 09771: Farm irrigation service.................... Other water service2 ...................... Total............ ........ .............. 1 90.1 mi 166 mi 2 112 ml 1 8.8 in 108 OF -21 OF 53 OF 190 days 4700.0 It 5.600 21, 782 27.442 2Urhan and suburban. residential, commercial, and industrial lands. ENGINEERING DATA Water Supply COLORADO RIVEn nrainage area above Grand Valley Diversion Dam ................................. Annual discharge at Cameo. Colo.: Maximum (914) ........................ Minimum (19631......................... Average ................................ Average annual diversion lall purposes I . . . .. . 8.055 mP 5.475.000 1.i49,000 3.132.000 77i ,000 acre-ft acre-ft acre.ft acre.ft . Diversion F acUities GRAI'iD V ALLEY DIVERSION DAM Type: Concrete. ogee [I!:atedl weir Location: Colorado River. about 8 mi north- east of Palisade, Colo. Year completed: 1916 Dimensions: Hydraulic height. . . . . . . . . . . . . . . . .. .. . . . .. Crest length. ......................... ... Weir crest elevation.......... ......... ... Volume .................... ......... ... Spillway: Weir surmounted by six roller gates 70 It long by 10.25 It in diameter. and one sluiceway 60 It wide with roller gate 15.33 It high. Capacity....... ........ ......... ....... Headworks: Nine gates. each 7olt.square, adjacent to west dam abutment. Diversion capacity....... ......... ... .... Carriage Facilities GOVERNMENT HIGH LINE CANAL Location: From Grand Valley Diversion Dain southwest about 20 mi along the Colorado River to vicinity of Grand Junction, Colo., then generally northwest about 35 mi. Construction period: 1912-1i Length...................,.........., .. Diversion capacity. ...................... Typical maximum section in earth: Bottom width............. ........... ... Side slopes.................. ..... .... ... Water depth ................ ......... ... Typical maximum section. concrete lined: Bottom width............... ..... .... ... Side slopes .'. . . . . . . . . . . . . . . . . . . . . . .. . . .. . U'ater depth ........ .................... Lining thickness ......................... TUNNEL NO.1 (GOVERNMENT HIGH LINE CANAL) Location: Near the Colorado River 2 mi south of Grand Valley Diversion Dam. Construction period: 1912-14 Length ....................,............ Capacil)' .............. ...... ........... Cross section: Horseshoe Height...................... ........... Width................................ .. Lining: Concrete TuNNEL No.2 iGoVERNMENT HIGH LINE CANALI Location: I"ear the Colorado River about 4 mi south of Grand Valle)' Diversion Dam. Construction period: 1913.14 Length _................................ Capacity................. ....... ....... Cross section: Horseshoe Hei,ht ......~.......................... \"'idth.. .... .......... ............... ... lAning: Concrete T1.:I'iNEL No.3 lGoVERNMENT HIGH LINE CANAL; Location: Near the Colorado River. about 5 mi south of Grand Valley Diversion Dam. 517 14 It 540ft 478~.O ft 25, ,no yd3 75.000 fe/s 1,675 ft3/s :)5 mi 1.6i5 ft3/s 38 It 1.5:1 HI.5 II 34 fl .2:1 HI.5 fl 4 in 3.723 ft 1.(,75 rels 14 It 17.5 It l.b:i5 it 1.6i5 It3/s 14 It 16 It