1991 North Platte Hydrology Study

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North Platte Project Dead storage below El. 4085.3 ............. 5,000 acre -ft HoRsE CREEK DIV-ERsioN DAM Surface area at El. 4125 ................... 2,160 acres Dimensions: Structural height ......................... Type: Concrete weir, embankment wing Structural height ......................... 114 ft Location: Horse Creek, 12 mi southeast of Hydraulic height ......................... 48 ft Torrington, Wyo. Top width .............................. 20 ft Year completed: 1923 Maximum base width ..................... 304 ft Dimensions: Crest length ............................. 3,760 ft Structural height ......................... Crest elevation .......................... 4140.0 ft Hydraulic height ......................... Volume . ............................... 696,000 yd3 Crest length ............................. Spillway: Uncontrolled overflow concrete weir Crest elevation .......................... in open channel in right abutment Volume ................................ Crest length ............................. 100 ft ...........,.. Crest elevation .......................... 4125.0 ft works: Two 4 -ft concrete pipes in con- DRY Shl T`A3T RSif i�AM crete conduit through base of dam. Each pipe is controlled by three 2 -ft needle Type: Steel sheet pile and earth valves. ,V : ; - -- gta /$ Location: Dry Spotted Tail Creek, 3 mi north Foundation: Generally fissured and somewhat un of Mitchell, Nebr. porous brule clay overlain by gravel and Year completed: 1954 loam 10- to 30 -ft deep. Dimensions: Structural height ......................... Special treatment: Foundation grouted. Crest length ............................. Crest elevation .......................... LAKE ALICE DAMS Volume ................................ Type: Homogeneous earthfill Trit -SP t 4)4VER9MN DAM Location: Offstream, 9 mi north of Scotts- bluff, Nebr. Upper dam is at west end of Type: Steel sheet pile and earth Lake Alice; lower dam at east end. Location: Tub Springs Creek, about 6 mi Construction period: Upper, 1911 -13; lower, east of Mitchell, Nebr. 1911 -12. Year completed: 1954 Reservoir, Lake Alice: Total capacity ' .................. IIAW aere -ft Dimensions: Active capacity, El. 4182 .................. 11,020 acre -ft Structural height . .......... ............. . Crest length ......................... . Surface area at El. 4182 ................... 776 acres on Crest elevation Dimensions: Upper Lower .......................... Volume . Structural height .................... 37 ft 24 ft ............................... Hydraulic height .................... 20 ft 13 ft Top width ......................... 31 ft 30 ft Carriage Facilities Maximum base width ............... 196 It 168 It Crest length ..................... 3,100 ft 2,550 ft Crest elevation .................. 4192.0 ft Volume ...................... 241,000 yd3 4192.0 119,000 ft yd I ANAL Spillway: Concrete -lined chute in right abut- ment of upper dam. None in lower dam. Location: From Whalen Diversion Dam near Crest length ............................. 100 ft Whalen, Wyo., southeast 55 mi along the Crest elevation .......................... 4182.0 ft North Platte River to Lake Alice. Outlet works: Three 3- by 4 -ft conduits Construction period: 1905 -15 controlled by vertical rectangular gates in Length .. ............................... upper dam; conduit controlled by 6 -ft- Diversion capacity ....................... square slide gate in lower dam. Typical maximum section in earth: Bottom width ........................... Diversion Facilities Side slopes ........................ . Water depth h .................. .. . WttMWW HIGH -LINE CANAL (INTERSTATE SYSTEM) Type: Concrete ogee weir, embankment wing Location: North Platte River, near Whalen, Wyo. Year completed: 19094 Dimensions: Structural height ......................... 35 ft Hydraulic height ......................... 11 ft Crest length ............................. 2,460 ft Crest elevation .......................... 4279.0 It Volume . ............................... 81,700 yd3 I ►+ r 'e'tr+Y ra 3/s s 4 Fort Laramie anal ................ .. %s "Supplemental construction performed in 1918, 1921, and 1923. Location: From Lake Alice generally south- east about 25 mi. Construction period: 1910 -13 Length.. ............................... Diversion capacity ....................... Typical maximum section in earth: Bottom width ........................... Side slopes .............................. Water depth ............................ Low -LINE CANAL (INTERSTATE SYSTEM) Location: From Lake Minatare generally southeast about 25 mi. Construction period: 1913 -14 17 ft 6 It 720 ft 412.0 ft 5,300 yd3 2 `;-: 14.5 ft 255 ft 3996.0 ft 700 yd3 11 ft 205 ft 4000.0 It 2,600 yd3 95 mi 2,2W fr/9 44 ft 1.5:1 10 ft 37 mi 160 ft3 /s 12 ft 2:1 4.5 ft is s