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Upper Stillwater

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Upper Stillwater completed
Upper Stillwater completed

Particulars

Owner: Central Utah Water Conservancy District

Designer: US Bureau of Reclamation

Contractor: Tyger Construction Co. Inc. (Atkinson Group)

Statistics

Type: Gravity

Purpose(s): Irrigation / Water Supply

Reservoir capacity: 37 m3x106

Height: 91 metres

Length: 815 metres

Volume of RCC: 1125 m3x103

Total volume: 1281 m3x103

Construction Dates

Start of Project: 12/83 (December 1983)

Start of RCC: 09/85 (September 1985)

End of RCC: 08/87 (August 1987)

End of Project: 12/87 (December 1987)

Country: USA

River: Rock Creek

DMS Co-ordinates: 40˚33'35.62"N, 110˚41'54.52"W

DD Co-ordinates: 40.559895, -110.698479

Facings

Upstream

SlopeType
VerticalSlip-formed/extruded facing elements

Downstream

SlopeType
0.32Slip-formed/extruded facing elements
0.60Slip-formed/extruded facing elements

Spillway

SlopeType
0.32Slip-formed/extruded facing elements  [stepped face]
0.60Slip-formed/extruded facing elements  [stepped face]

Placement

Layers (mm)Lifts (mm)
300300

Cementitious material

Cement (kg/m3)
79
Pozzolan (kg/m3)Pozzolan Type
173Low-lime flyash (ASTM Class F)