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Holly Dam
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Holly Dam Share
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Fenton, Michigan
Local government owned
Built in 1840

Holly Dam is built on the Shiawassee River and is located in Fenton, Michigan. It was built in 1840 .

The dam is owned by the local government. It is also known as Stiff's Millpond Dam.

Location
Holly Dam
Fenton, Michigan, U.S.
Dam type
Other
Dam type
Other
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Village of Holly
Owner
Local government

Holly Dam is owned by the local government.

Construction Share
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1840
Completed
Shiawassee River
River built on
Holly Dam was built in 1840.
Metrics Share
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Summary
Dam length 400 feet
Dam height 12 feet
Structural height 12 feet
Hydraulic height 12 feet
Max discharge 600 cubic feet per second
Max storage 555 acre feet
Normal storage 430 acre feet
Surface area 90 acres
Drainage area 40 square miles
400 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.

12 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.

12 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.

12 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.

600 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.

555 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.

430 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.

90 acres
Surface area

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

40 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.

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.

7/31/2017
Most recent inspection date

Inspections are every 4 years.

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Also known as Stiff's Millpond Dam
Distance to nearest town (miles) 4
Latitude 42
Longitude -83
NID ID (National ID) MI00253

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