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Hennepin Ash Pond 2 Dam
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Hennepin Ash Pond 2 Dam Share
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Hennepin, Illinois
Public utility owned

Hennepin Ash Pond 2 Dam is an earth dam built on the Illinois R. River and is located in Hennepin, Illinois. It was built .

The dam is owned by the public utility, Dynegy Midwest Generation, LLC. It is also known as Retired Ash Pond 2.

Location
Hennepin Ash Pond 2 Dam
Hennepin, Illinois, U.S.
Dam type
Earth
Dam type
Other
Purpose
Unknown
Foundation type
Unknown
Core type
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Dynegy Midwest Generation, LLC
Owner
Public utility

Hennepin Ash Pond 2 Dam is owned by the public utility, Dynegy Midwest Generation, LLC.

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Summary
Dam length 3,200 feet
Dam height 52 feet
Max discharge 48 cubic feet per second
Max storage 60 acre feet
Normal storage 26 acre feet
Surface area 5 acres
Drainage area 0 square miles
3,200 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.

52 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.

48 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.

60 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.

26 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.

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Significant
Downstream potential hazard

Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be located in areas with population and significant infrastructure.

No 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.

11/2/2016
Most recent inspection date

Inspections are every 3 years.

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Also known as Retired Ash Pond 2
Distance to nearest town (miles) 5
Latitude 41
Longitude -89
NID ID (National ID) IL50663

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