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Highway 71 Dam
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Highway 71 Dam Share
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Overview Share
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Austin, Texas
Flood Control
Local government owned
Built in 1999

Highway 71 Dam is built on the Williamson River and is located in Austin, Texas. It was built in 1999 for the purpose of flood control.

The dam is owned by the local government. The dam used to be known as Coa Residential Pond 677.

Location
Highway 71 Dam
Austin, Texas, U.S.
Dam type
Other
Dam type
Flood control
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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City of Austin
Owner
Local government

Highway 71 Dam is owned by the local government.

Construction Share
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1999
Completed
Camp Dresser and Mckee Inc
Dam designer
Williamson River
River built on
Highway 71 Dam was built in 1999.
Metrics Share
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Summary
Dam length 730 feet
Dam height 26 feet
Structural height 26 feet
Hydraulic height 26 feet
Max discharge 14,836 cubic feet per second
Max storage 156 acre feet
Drainage area 1 square miles
730 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.

26 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.

26 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.

26 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.

14,836 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.

156 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.

1 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.

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Not available
Downstream potential hazard

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.

5/30/2015
Most recent inspection date

Inspections are every 2 years.

About Share
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Former name Coa Residential Pond 677
Latitude 30
Longitude -97
NID ID (National ID) TX07223

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