Otter Tail Lake Dam, Minnesota, USA

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Quick Facts About Otter Tail Lake Dam

Location: Otter Tail, Minnesota
Coordinates: 46.35911, -95.7335
River: Otter Tail River
Primary Purpose: Other
Type: Gravity
Commissioned: 1936
Dam Height: 6 ft (2 m)
Dam Length: 125 ft (38 m)
Dam Capacity: 557,200 acre-ft (687,295 Ml)
Condition Assessment: Satisfactory

Otter Tail Lake Dam Map

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Otter Tail Lake Dam Information

Otter Tail Lake Dam is a gravity dam located about 7 miles from Phelps, Otter Tail, Minnesota.

The dam, which is on the Otter Tail River, was primarily built for Other purposes, but also serves for benefits.

The dam was designed by and commissioned in 1936 and is currently owned by MNDNR-EWR.

Otter Tail Lake Dam Structure

The Otter Tail Lake Dam is approximately 125 feet (38 m) long, 6 feet (2 m) high and has a structural volume of cubic yards (0 cubic metres).

Otter Tail Lake Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 506,000 acre-ft (624,141 Ml) and maximum capacity of 557,200 acre-ft (687,295 Ml).

The surface area of the reservoir is 14,745 acres (5,967 ha) and the total catchment area is 1,160 square miles (3,004 square kilometres).

Otter Tail Lake Dam Spillway

The dam has a 105 feet (32 m) wide uncontrolled spillway with a maximum discharge capacity of 4372 cubic feet per second (124 cubic metres per second).

Otter Tail Lake Dam Compared to Four Famous American Dams

Otter Tail Lake Dam
Otter Tail, Minnesota
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) 6 730 550 357 216
Length (Ft) 125 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 557,200 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 1,160 167,800 74,100 3,611 108,355

Otter Tail Lake Dam Weather

Current Conditions at Otter Tail Lake Dam

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7-Day Forecast for Otter Tail Lake Dam

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Otter Tail Lake Dam Frequently Asked Questions

In which state is the Otter Tail Lake Dam?

Otter Tail Lake Dam is in Minnesota.

In which county is the Otter Tail Lake Dam?

Otter Tail Lake Dam is in Otter Tail County.

How high is the Otter Tail Lake Dam?

Otter Tail Lake Dam is 6 feet high.

How long is the Otter Tail Lake Dam?

Otter Tail Lake Dam is 125 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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