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Herns Pond Dam
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Herns Pond Dam Share
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Port Royal, Virginia
Federal ownership
Built in 1950

Herns Pond Dam is an earth dam built on the Mill Creek TR River and is located in Port Royal, Virginia. It was built in 1950 and modified in 1974 .

The dam is under federal ownership and is owned by the Fort A. P. Hill.

Location
Herns Pond Dam
Port Royal, Virginia, U.S.
Dam type
Earth
Dam type
Other
Purpose
Soil
Foundation type
Unknown
Core type
Ownership Share
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Fort A. P. Hill
Owner
Federal

Herns Pond Dam is under federal ownership and is owned by the Fort A. P. Hill.

Construction Share
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1950
Completed
1974
Modified
Army
Dam designer
Mill Creek TR River
River built on
Herns Pond Dam was built in 1950 and modified in 1974.
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Summary
Dam length 380 feet
Dam height 18 feet
Structural height 18 feet
Hydraulic height 11 feet
Max discharge 7 cubic feet per second
Max storage 68 acre feet
Normal storage 24 acre feet
Surface area 5 acres
Drainage area 0 square miles
380 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.

18 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.

18 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.

11 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.

7 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.

68 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.

24 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.

5 acres
Surface area

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

0 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.

Has emergency action plan
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.

8/19/2014
Most recent inspection date

Inspections are every 4 years.

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Distance to nearest town (miles) 2
Latitude 38
Longitude -77
NID ID (National ID) VA033036

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