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General
Vicinity Map
Region (Map) ....................... Great Plains
State (Map) ............................... Montana
County ........................................ Pondera
Project ...................................................... ?
Dam type ........... Concrete double curvature arch
Location ............ 50 mi W of Conrad, MT
Watercourse ......................... Birch Creek
Reservoir ........................................... Swift
Original construction .............. 1965-1967
National ID Number ................. MT00581
Hydrologic Unit Code ................... |
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Hydraulics
Total storage to
El. 4883.5 ........................... 29,975 acre-ft
Service spillway
Capacity at El. 4892 ............... 21,200 cfs
Auxiliary spillway
Capacity at El. 4892 ............... 12,500 cfs
Outlet works
Capacity at El. 4883.5 .............. 2,580 cfs |
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Dimensions
Crest Elevation ................................. 4892 ft
Top of Parapet Elevation ................ 4896 ft
Structural Height ................................ 205 ft
Hydraulic Height ..............................170.5 ft
Crest Length ....................................... 560 ft
Crest Width ............................................. 9 ft
Base Width ........................................... 22 ft
Volume of Concrete ............... 54,000 cu yd |
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Hydrology
Drainage area .............................. 75.3 sq mi
IDF ................................ 1964 General storm
Volume .......... 58,000 acre-feet over 3 days
Peak inflow ................................... 36,000 cfs
Maximum water surface .............. El. 4892 ft |
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