First Conn Lake South Bay Dike

First Conn Lake South Bay Dike Quick Facts

Location: Coos, New Hampshire
Coordinates: 45.0669, -71.2525
River: Connecticut River
Primary Purpose: Recreation
Type: Earth
Commissioned:
Dam Height: 14 ft (4 m)
Dam Length: 390 ft (119 m)
Dam Capacity: 38,950 acre-ft (48,044 Ml)
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First Conn Lake South Bay Dike Map

First Conn Lake South Bay Dike Information

First Conn Lake South Bay Dike is an earthen embankment dam located in Pittsburg, Coos, New Hampshire.

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

The dam was designed by and commissioned in and is currently owned by GREAT RIVER HYDRO LLC.

First Conn Lake South Bay Dike Structure

The First Conn Lake South Bay Dike is approximately 390 feet (119 m) long, 14 feet (4 m) high and has a structural volume of cubic yards (0 cubic metres).

First Conn Lake South Bay Dike Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 15,950 acre-ft (19,674 Ml) and maximum capacity of 38,950 acre-ft (48,044 Ml).

The surface area of the reservoir is 2,800 acres (1,133 ha) and the total catchment area is 82 square miles (212 square kilometres).

First Conn Lake South Bay Dike Spillway

According to the latest available data, the First Conn Lake South Bay Dike does not have any spillways.

First Conn Lake South Bay Dike Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
First Conn Lake South Bay Dike
Coos, New Hampshire
Height (ft)
14
Length (Ft)
390
Storage Volume (acre-ft)
38,950
Drainage Area (sq miles)
82
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

First Conn Lake South Bay Dike Weather

Current Conditions at First Conn Lake South Bay Dike

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7-Day Forecast for First Conn Lake South Bay Dike

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First Conn Lake South Bay Dike Frequently Asked Questions

In which state is the First Conn Lake South Bay Dike?

First Conn Lake South Bay Dike is in New Hampshire.

In which county is the First Conn Lake South Bay Dike?

First Conn Lake South Bay Dike is in Coos County.

How high is the First Conn Lake South Bay Dike?

First Conn Lake South Bay Dike is 14 feet high.

How long is the First Conn Lake South Bay Dike?

First Conn Lake South Bay Dike is 390 feet long.

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More Dams in Coos County:

Errol Dam
First Conn Lake South Bay Dike
First Connecticut Lake Dam
Lay Dam
Murphy Dam
Pony Creek - Upper Dam
Second Connecticut Lake 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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