Mio Dam, Michigan, USA

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Quick Facts About Mio Dam

Location: Oscoda, Michigan
Coordinates: 44.661, -84.1318
River: Au Sable River
Primary Purpose: Hydroelectric
Type: Gravity Earth
Commissioned: 1917
Dam Height: 38 ft (12 m)
Dam Length: 2,120 ft (646 m)
Dam Capacity: acre-ft (0 Ml)
Condition Assessment: Satisfactory

Mio Dam Map

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Mio Dam Information

Mio Dam is a gravity earth dam located about 8 miles from Comins Flats, Oscoda, Michigan.

The dam, which is on the Au Sable River, was primarily built for Hydroelectric purposes, but also serves for Recreation benefits.

The dam was designed by and commissioned in 1917 and is currently owned by Consumers Energy Company.

Mio Dam Structure

The Mio Dam is approximately 2,120 feet (646 m) long, 38 feet (12 m) high and has a structural volume of 419,571 cubic yards (320,785 cubic metres).

Mio Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 6,061 acre-ft (7,476 Ml) and maximum capacity of acre-ft (0 Ml).

The surface area of the reservoir is 661 acres (267 ha) and the total catchment area is 1,100 square miles (2,849 square kilometres).

Mio Dam Spillway

The dam has a 20 feet (6 m) wide controlled spillway with a maximum discharge capacity of 16000 cubic feet per second (453 cubic metres per second).

Mio Dam Compared to Four Famous American Dams

Mio Dam
Oscoda, Michigan
Hoover Dam
Clark County, Nevada
Grand Coulee Dam
Okanogan County, Washington
Theodore Roosevelt Dam
Maricopa County, Arizona
Glen Canyon Dam
Coconino County, Arizona
Height (ft) 38 730 550 357 216
Length (Ft) 2,120 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 1,100 167,800 74,100 3,611 108,355

Mio Dam Weather

Current Conditions at Mio Dam

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7-Day Forecast for Mio Dam

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Mio Dam Frequently Asked Questions

In which state is the Mio Dam?

Mio Dam is in Michigan.

In which county is the Mio Dam?

Mio Dam is in Oscoda County.

How high is the Mio Dam?

Mio Dam is 38 feet high.

How long is the Mio Dam?

Mio Dam is 2,120 feet long.

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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