Oahe Dam - Spring Creek Sub-Impoundment is an earth dam built on the Spring Creek River and is located in Pollack, South Dakota. It was built in 1961 .
The dam is under federal ownership and is owned by the Cenwo. It is also known as Lake Pocasse.
Oahe Dam - Spring Creek Sub-Impoundment is under federal ownership and is owned by the Cenwo.
|Dam length||3,200 feet|
|Dam height||40 feet|
|Structural height||40 feet|
|Max discharge||4,400 cubic feet per second|
|Max storage||26,000 acre feet|
|Drainage area||660 square miles|
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.
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.
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.
Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.
Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.
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.
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.
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.
Inspections are every 5 years.
|Also known as||Lake Pocasse|
|Distance to nearest town (miles)||0|
|NID ID (National ID)||SD01095|