Lake Mills Dam

Lake Mills Dam Quick Facts

Location: Jefferson, Wisconsin
Coordinates: 43.078748, -88.9137864
River: Rock Creek River
Primary Purpose: Recreation
Type: Gravity Earth
Commissioned: 1865
Dam Height: 17 ft (5 m)
Dam Length: 400 ft (122 m)
Dam Capacity: 28,330 acre-ft (34,944 Ml)
Condition Assessment: Satisfactory
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Lake Mills Dam Map

Lake Mills Dam Information

Lake Mills Dam is a gravity earth dam located in Lake Mills, Jefferson, Wisconsin.

The dam, which is on the Rock Creek River, was primarily built for Recreation purposes, but also serves for benefits.

The dam was designed by and commissioned in 1865 and is currently owned by City of Lake Mills.

Lake Mills Dam Structure

The Lake Mills Dam is approximately 400 feet (122 m) long, 17 feet (5 m) high and has a structural volume of cubic yards (0 cubic metres).

Lake Mills Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 25,590 acre-ft (31,565 Ml) and maximum capacity of 28,330 acre-ft (34,944 Ml).

The surface area of the reservoir is 1,371 acres (555 ha) and the total catchment area is 11 square miles (28 square kilometres).

Lake Mills Dam Spillway

The dam spillway has a maximum discharge capacity of 115 cubic feet per second (3 cubic metres per second).

Lake Mills Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Lake Mills Dam
Jefferson, Wisconsin
Height (ft)
17
Length (Ft)
400
Storage Volume (acre-ft)
28,330
Drainage Area (sq miles)
11
Hoover Dam
Clark County, Nevada
Height (ft)
730
Length (Ft)
1,244
Storage Volume (acre-ft)
30,237,000
Drainage Area (sq miles)
167,800
Grand Coulee Dam
Okanogan County, Washington
Height (ft)
550
Length (Ft)
5,673
Storage Volume (acre-ft)
9,562,0000
Drainage Area (sq miles)
74,100
Theodore Roosevelt Dam
Maricopa County, Arizona
Height (ft)
357
Length (Ft)
1,208
Storage Volume (acre-ft)
3,411,500
Drainage Area (sq miles)
5,736
Oroville Dam
Butte County, California
Height (ft)
235
Length (Ft)
6,920
Storage Volume (acre-ft)
3,540,000
Drainage Area (sq miles)
3,611
Glen Canyon Dam
Coconino County, Arizona
Height (ft)
216
Length (Ft)
1,565
Storage Volume (acre-ft)
29,875,000
Drainage Area (sq miles)
108,355

Lake Mills Dam Weather

Current Conditions at Lake Mills Dam

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7-Day Forecast for Lake Mills Dam

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Lake Mills Dam Frequently Asked Questions

In which state is the Lake Mills Dam?

Lake Mills Dam is in Wisconsin.

In which county is the Lake Mills Dam?

Lake Mills Dam is in Jefferson County.

How high is the Lake Mills Dam?

Lake Mills Dam is 17 feet high.

How long is the Lake Mills Dam?

Lake Mills Dam is 400 feet long.

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More Dams in Jefferson County:

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Cardinal Fly Ash No. 2 Dam
Cheesman Dam
Cherokee Dam
Col. Charles D. Maynard Lock and Dam
Consol/Rend Lake Mine/Slurry Cell 2 Dam
Delmoe Lake Dam
Emmett Sanders Lock and Dam
Fortune Dam
Haystack Dam
Joe Hardin Lock and Dam
Lake Miccosukee Dam
Lake Mills Dam
Marston Lake - West Dike
Pelton Dam
Perry Dam
Ralston Dam
Round Butte Dam
Standley Lake Dam
Suttle Dam
Waurika Dam
Whitetail Dam

Condition Assessment Classification

Satisfactory

No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.

Fair

No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum

Poor

A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.

Unsatisfactory

A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.

Not Rated

The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.

Not Available

Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Significant

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 in areas with population and significant infrastructure.

Low

Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner’s property.

Undetermined

Dams for which a downstream hazard potential has not been designated or is not provided.

Not Available

Dams for which the downstream hazard potential is restricted to approved government users.

Source: National Inventory of Dams

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