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1150 Climatic Condition~ Annual precipitation..................... Temperature: MaximUfi!. ...................... ........ Minimum ...... ................ ........ Mean .................................. Growing 8ea8:QD.......................... Elevation of irrigable area................. ENGINEERING DATA Waler Supply RIFLE CREEK Drainage area at Rifle Gap Dam........... Annual di~arge:. Maximum 119581 .... .................... Minimum U9561......................... Average....:~......................... . Storage Facilities RIFLE GAP DAM Typ., Zoned earthfm Location: On Rille -Creek. 5.5 miles north of Rifle, Colo. COIUltruction period: ~ 964-6 7 Reservoir. Rifle Gap: To~l capacity to El. S960................. Active ~pac~ty..... ... ... ............ ... Surface area ............................. DUnensi9os: Structnralhcight........................ . Hydraulic height......................... Top width ...................... ........ Muhnlimbasewidth.................... . Creatl~ngth....... ...................... Crest elevation...... .... ............ .... Volume ................................ Spillway: Ungated ogee crest with concrete chute at leIt abutment. (;opacity atEI. 5971.~.................... Outlet works: eon"",,,, tonnel through left abutment and gate c~r. River: ~ft-dia'meter tunnel disc4arging into spillway stilling basin, controlled by two 2.25-ft-square high-pressure gates. Capacity at El. 5971.8......._............ . Silt Project Il.l i!l 104 OF -33 OF 4ll OF 160-165 days 5500-6000.0 !~ 142 mi2 26,000 acre-ft ... 14,800 acre-ft l.8.6OO acre-ft ----~~ 13.602 acre-ft 12,168 ac~-ft 359 acre. 157 It 120 It 30 It 800 It 1,450 It 59'78.0 It 1,768,000 yd' 3,645 lts/s ."pf'lf ... \ 326 ftSls "l>lL- ~~ ~'lr-(~(J . Davie Ditch: 30-in steel pipe branching from gate chamber, controlled by one 2.25-ft- square high-pressure gate. Capacity............ ....... ... ......... CaniageFacUitie~ DAVIE DITCH CANAL ......_~,-""'^,._.. Location: From Rifle Gap Reservoir. ex- tending south 4.9 mi. Construction period: Rehabilitated by Reclamation, 1965-66 Length ................................. Initial capacity ...... ....... ... .......... Bottom width..... .............. ........ Side slopes........................... Water depth...,..................... GRASS V ALLEY CANAL Location: From East Rifle Creek above Rifle Gap Reservoir, extending generally south and east to existing Harvey Gap Reservoir Construction period: Rehabilitated b~. Reclamation, 1965-66 Length ................... Initial capacity. . . . . . . . . . . . . . Bottom width ............... Side slopes........... ........ Water depth ............. SILT PUMP CANAL Location: At end of an inlet canal from the Colorado River about 2 mi east of Silt. Colo., extends to the Qorthwest. COmltruction period.: 1965-66 Length ................................. Initial capacity " ........... ....... ...... Bottom width....... .................... Side slopes.......... .................... Water depth ............................ SILT PUMPING PLANT Location: Near the Colorado River about 2 mi east of the town of Silt, Colo. Number of units......................... Total capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . Total dynamic head. . . . . . . . . . . . . . . . . . . . . . Total horsepower. . . . . . . . . . . . . . . . . . . . . . . . 18 W/s 4.9 mi ~ 2:1 1.4 It 1 mi ~ 8 It 2:1 3.5 It 7.6 mi ~ 6 It 2:1 1.4 It 4 ~. ~- 1,275