Coffeen GMF Gypsum Stack Dam is an earth dam built on the Mcdavid Branch East Fork Shoal River and is located in Coffeen, Illinois. It was built for the purpose of debris control.
The dam is owned by the public utility, Dynegy Midwest Generation, Inc. It is also known as Ameren Coffeen GMF Gypsum Stack Dam.
Coffeen GMF Gypsum Stack Dam is owned by the public utility, Dynegy Midwest Generation, Inc..
|Dam length||5,100 feet|
|Dam height||108 feet|
|Max discharge||1,100 cubic feet per second|
|Max storage||2,355 acre feet|
|Surface area||38 acres|
|Drainage area||38 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.
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.
Surface area, in acres, of the impoundment at its normal retention level.
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 high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
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 1 ear.
|Also known as||Ameren Coffeen GMF Gypsum Stack Dam|
|Distance to nearest town (miles)||1|
|NID ID (National ID)||IL50579|