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Warhorse Dam
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Warhorse Dam Share
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Overview Share
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Mosby, Montana
Irrigation
Federal ownership
Built in 1911

Warhorse Dam is an earth dam built on the Fords CR. & Buffalo CR. Offst River and is located in Mosby, Montana. It was built in 1911 for the purpose of irrigation.

The dam is under federal ownership and is owned by the U.S. D.O.I. B.L.M.

Location
Warhorse Dam
Mosby, Montana, U.S.
Dam type
Earth
Dam type
Irrigation
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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U.S. D.O.I. B.L.M.
Owner
Federal

Warhorse Dam is under federal ownership and is owned by the U.S. D.O.I. B.L.M..

Construction Share
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1911
Completed
Fords CR. & Buffalo CR. Offst River
River built on
Warhorse Dam was built in 1911.
Metrics Share
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Summary
Dam length 1,950 feet
Dam height 24 feet
Hydraulic height 24 feet
Max discharge 1,200 cubic feet per second
Max storage 21,750 acre feet
Normal storage 12,750 acre feet
Surface area 1,300 acres
Drainage area 180 square miles
1,950 feet
Dam length

Length of the dam is defined as the length along the top of the dam. This also includes the spillway, powerplant, navigation lock, fish pass, etc., where these form part of the length of the dam. If detached from the dam, these structures should not be included.

24 feet
Dam height

Height of the dam is defined as the vertical distance between the lowest point on the crest of the dam and the lowest point in the original streambed.

24 feet
Hydraulic height

Hydraulic height of the dam is defined as the vertical difference between the maximum design water level and the lowest point in the original streambed.

1,200 cubic feet per second
Max discharge

Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.

21,750 acre feet
Max storage

Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.

12,750 acre feet
Normal storage

Normal storage is defined as the total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surcharge storage. For normally dry flood control dams, the normal storage will be a zero value.

1,300 acres
Surface area

Surface area, in acres, of the impoundment at its normal retention level.

180 square miles
Drainage area

Drainage area of the dam, in square miles, which is defined as the area that drains to a particular point (in this case, the dam) on a river or stream.

Safety Share
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Low
Downstream potential hazard

Dams assigned the low hazard potential classification are those where failure or misoperation results in no probable loss of human life and low economic and/or environ-mental losses. Losses are principally limited to the owner’s property.

Not required
Emergency action plan

An emergency action plan is defined as a plan of action to be taken to reduce the potential for property damage and loss of life in an area affected by a dam failure or large flood.

9/3/1980
Most recent inspection date

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Distance to nearest town (miles) 50
Latitude 47
Longitude -108
NID ID (National ID) MT00013

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