Great East Lake Dam, New Hampshire, USA

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Quick Facts About Great East Lake Dam

Location: Carroll, New Hampshire
Coordinates: 43.5697, -70.9727
River: Salmon Falls River
Primary Purpose: Recreation
Type: Concrete
Commissioned: 1825
Dam Height: 15 ft (5 m)
Dam Length: 68 ft (21 m)
Dam Capacity: 27,700 acre-ft (34,167 Ml)

Great East Lake Dam Map

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Great East Lake Dam Information

Great East Lake Dam is a concrete dam located in Wakefield, Carroll, New Hampshire.

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

The dam was designed by and commissioned in 1825 and is currently owned by NH DES WATER DIVISION.

Great East Lake Dam Structure

The Great East Lake Dam is approximately 68 feet (21 m) long, 15 feet (5 m) high and has a structural volume of cubic yards (0 cubic metres).

Great East Lake Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 19,600 acre-ft (24,176 Ml) and maximum capacity of 27,700 acre-ft (34,167 Ml).

The surface area of the reservoir is 1,825 acres (739 ha) and the total catchment area is 16 square miles (41 square kilometres).

Great East Lake Dam Spillway

The dam spillway has a maximum discharge capacity of 1305 cubic feet per second (37 cubic metres per second).

Great East Lake Dam Compared to Four Famous American Dams

Great East Lake Dam
Carroll, New Hampshire
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) 15 730 550 357 216
Length (Ft) 68 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 27,700 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 16 167,800 74,100 3,611 108,355

Great East Lake Dam Weather

Current Conditions at Great East Lake Dam

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7-Day Forecast for Great East Lake Dam

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Great East Lake Dam Frequently Asked Questions

In which state is the Great East Lake Dam?

Great East Lake Dam is in New Hampshire.

In which county is the Great East Lake Dam?

Great East Lake Dam is in Carroll County.

How high is the Great East Lake Dam?

Great East Lake Dam is 15 feet high.

How long is the Great East Lake Dam?

Great East Lake Dam is 68 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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