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<br />14
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<br />FLATIRON DAM
<br />
<br />CJl
<br />
<br />Type: Zoned earthfill
<br />Location: On Chimney Hollow Creek 8 mi
<br />southwest of Loveland, Colo.
<br />Construction period: 1951-53
<br />,Date of closure (first storage!: January 1954
<br />Reservoir, Flatiron:
<br />Total capacity to EI. 5472.8 . . . . . . . . . . . . . . . .
<br />Active capacity, EI. 5462-5472.8. . . . . . . . . . . .
<br />
<br />Surface area. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Dimensions:
<br />Structural height. . . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydraulic height. . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Top width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Maximum base width. . . . . . . . . . . . . . . . . . . . .
<br />
<br />Crest length . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Crest elevation ..........................
<br />Total volume. . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Spillway: Uncontrolled concrete crest and
<br />concrete-lined channel at left abutment.
<br />Crest elevation .......'..................
<br />Capacity at EI. 5480 . . . . . . . . . . . . . . . . . . . . _ .
<br />Outlet works: Twin-barrel concrete conduit
<br />through base of dam near left abutment
<br />controlled by two 6.75- by 9.0-ft radial
<br />gates.
<br />Capacity at El. 5464.8 . . . . . . . . . . . . . . . . . . . .
<br />
<br />en
<br />
<br />CARTER LAKE DAMS
<br />
<br />Type: Zoned earthfill
<br />Location: Carter Lake No.1, the southern-
<br />most dam, is at a natural outlet from
<br />Carter Lake Basin, 7 mi northwest of Ber-
<br />thoud, Colo. Carter Lake No.2 is in a
<br />saddle on east shoreline of the reservoir.
<br />No.3 is in a saddle on the north shoreline.
<br />Construction period: 1950-52
<br />Reservoir, Carter Lake:
<br />Total capacity to EI. 5759 . . . . . . . . . . . . . . . . .
<br />Active capacity, EI. 5618-5759 . . . . . . . . . . . . .
<br />
<br />Surface area. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Dimensions: No.1
<br />Structural height ........ 214 ft
<br />Hydraulic height ........ 190 ft
<br />Top width .............. 40 It
<br />Maximum base width .... 1,320 It
<br />Crest length ............ 1,235 It
<br />Crest elevation .......... 5769.0 It
<br />Total volume ........... 2,547,388 yd!
<br />Spillway: None
<br />Outlet works: Concrete conduit through base
<br />01 Dam. No.1, controlled by two 3-ft-
<br />square slide gates.
<br />Capacity at EI. 5763 . . . . . . . . . . . . . . . . . . . .
<br />Foundation: Sandstones, limestones,
<br />siltstones, and shales in alternating lay-
<br />ers, generally broken and fractured.
<br />Special treatment: Foundations grouted.
<br />
<br />Colorado-Big Thompson Project
<br />
<br />86 ft
<br />55 ft
<br />30 ft
<br />455 ft
<br />1,725 ft
<br />5486.0 ft
<br />382,000 yd'
<br />
<br />760 acre-It
<br />436 acre-It
<br />47 acres
<br />
<br />5472.8 ft
<br />23,600 ft'/s
<br />
<br />930 lt'ls
<br />
<br />112,2~0 acre-ft
<br />101,022 acre-ft
<br />1,140
<br />No.2
<br />75 ft
<br />Offstream
<br />30 It
<br />368 It
<br />1,500 It
<br />5769.0 ft
<br />321,174 yd'
<br />
<br />HORSETOOTH DAM AND SATANKA DIKE
<br />
<br />Type: Zoned earthfill
<br />Location: North end of Horsetooth Reser-
<br />voir,
<br />4mi northwest 01 Fort Collins, Colo.
<br />Sa tanka Dike closes saddle on north
<br />shoreline, about 800 It northwest 01 the
<br />dam.
<br />Construction period: 1940-49
<br />Date of closure (first storagel: January 10,
<br />1951
<br />Reservoir, Horsetooth:
<br />Total capacity to El. 5430 . . . . . . . . . . . . . . .
<br />Active capacity, EI. 5270-5430 . . . . . . . . . . .
<br />
<br />151,750
<br />143,480
<br />
<br />No.3
<br />55 It
<br />Offstream .
<br />30 It
<br />270 ft
<br />1,425 It
<br />5769.0 It
<br />211,852 yd'
<br />
<br />1,260 ft'ls
<br />
<br />acre-ft
<br />acre-ft
<br />
<br />Surface area. . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Dimensions:
<br />Structural height . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydraulic height. . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Top width .. . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Maximum base width. . . . . . . . . . . . . . . . . . .
<br />
<br />Crest length. .. . .. . ... .. .. . . . .. .~. . . ...
<br />Crest elevation. . . . . . . . . . . . . . . . . . ':. . . . . .
<br />Total volume (dam and dike).............
<br />Spillway: None
<br />Outlet works: Concrete conduit through base
<br />of dam, controlled by two 72-in hollow-
<br />jet valves.
<br />Capacity at EI. 5430 . . . .. ... . . .. .... ., ..
<br />Foundation: Limey shales and sandstones
<br />overlain with silty, sandy clay.
<br />Special treatment: Cutoff trench and con-
<br />crete cutoff wall.
<br />
<br />SOLDIER CANYON DAM
<br />
<br />Type: Zoned earthIill
<br />Location: East shore of Horsetooth Reser-
<br />voir, 3.5 mi west of Fort Collins, Colo.
<br />Construction period: 1946-49
<br />Dimensions:
<br />Structural height . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydraulic height. . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Top width ............................
<br />Maximum base width . . . . . . . . . . . . . . . . . . .
<br />
<br />Crest 'length . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Crest elevation. . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Total volume . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Spillway: None
<br />Outlet works: Concrete-lined, tunnel
<br />through right abutment housing 30-in
<br />steel pipe, controlled by one 18-in pivot
<br />(butterfly I valve.
<br />Capacity at EI. 5430 . . . . . . . . . . . . . .. . . . . .
<br />Foundation: SandBIDne and Bhale
<br />Special treatment:.Cutoff trench and
<br />concrete cutoff wall.
<br />
<br />DIXON CANYON DAM
<br />
<br />Type: Zoned earthfill
<br />Location: East shore of Horsetooth Reser-
<br />voir, 3 mi southeast 01 Fort Collins,
<br />Colo.
<br />Construction period: 1946-49
<br />Dimensions:
<br />Structural height . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydraulic height.. . .. . .. . ......... . .. . .
<br />
<br />Top width ............................
<br />Maximum base width. . . . . . . . . . . . . . . . . . .
<br />
<br />Crest length. . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Crest elevation . . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Total volume. . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Spillway: None
<br />Outlet works: None
<br />Foundation: Sandstone and shale
<br />Special treatment: Cutoff trench and con-
<br />crete cutoff wall.
<br />
<br />SPRING CANYON DAM
<br />
<br />Type: Zoned earthfill
<br />Location: East shore of Horsetooth Reser-
<br />voir, 4.5 mi southwest of Fort Collins,
<br />Colo.
<br />Construction period: 1940-49
<br />Dimensions:
<br />Structural height. . . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydraulic height. . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />Top width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Maximum base width. . . . . . . . . . . . . . . . . . . . .
<br />
<br />Crest length . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />1,899 acres
<br />Dam Dike
<br />155 ft 30 ft
<br />Offstream Offstream
<br />35 ft 25 ft
<br />785 ft 120 ft
<br />1,840 ft 348 ft
<br />5440.0 ft 5440.0 ft
<br />1,871,363 yd'
<br />
<br />2,500 lt'ls
<br />
<br />226 ft
<br />203 ft
<br />40 ft
<br />1,365 It
<br />1,438 It
<br />5440.0 It
<br />3,211,621 yd'
<br />
<br />90 It'ls
<br />
<br />240 ft
<br />215 It
<br />40 It
<br />1,500 ft
<br />1,265 It
<br />5440.0 ft
<br />2,961,350 yd'
<br />
<br />220 ft
<br />198 ft
<br />40 ft
<br />1,350 ft
<br />1,120 It
<br />
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