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Petro No. 1 Dam
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Petro No. 1 Dam Share Share

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Midwest, Wyoming
Grade Stabilization
Federal ownership
Built in 1999

Petro No. 1 Dam is a gravity dam built on the Hendry Draw River and is located in Midwest, Wyoming. It was built in 1999 for the purpose of grade stabilization.

The dam is under federal ownership and is owned by the Doi BLM.

Location
Petro No. 1 Dam
Midwest, Wyoming, U.S.
Dam type
Gravity
Dam type
Grade stabilization
Purpose
Unknown
Foundation type
Earth
Core type
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Map Share Share
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Ownership Share Share
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Doi BLM
Owner
Federal

Petro No. 1 Dam is under federal ownership and is owned by the Doi BLM.

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Construction Share Share
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1999
Completed
BLM
Dam designer
Hendry Draw River
River built on
Petro No. 1 Dam was built in 1999.
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Metrics Share Share
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Summary
Dam length 314 feet
Dam height 27 feet
Structural height 27 feet
Hydraulic height 20 feet
Max discharge 64 cubic feet per second
Max storage 8 acre feet
Normal storage 19 acre feet
Surface area 8 acres
314 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.

27 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.

27 feet
Structural height

Structural height of the dam is defined as the vertical distance from the lowest point of the excavated foundation to the top of the dam. Top of dam refers to the parapet wall and not the crest.

20 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.

64 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.

8 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.

19 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.

8 acres
Surface area

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

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Safety Share 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.

7/23/2017
Most recent inspection date

Inspections are every 5 years.

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About Share Share
Distance to nearest town (miles) 10
Latitude 43
Longitude -106
NID ID (National ID) WY02344
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