Pine Mountain Lake Dam

Pine Mountain Lake Dam Quick Facts

Location: Cass, Minnesota
Coordinates: 46.80292, -94.52045
River: Pine River
Primary Purpose: Recreation
Type: Gravity
Commissioned: 1936
Dam Height: 6 ft (2 m)
Dam Length: 45 ft (14 m)
Dam Capacity: 126,737 acre-ft (156,328 Ml)
Condition Assessment: Satisfactory
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Pine Mountain Lake Dam Map

Pine Mountain Lake Dam Information

Pine Mountain Lake Dam is a gravity dam located in Backus, Cass, Minnesota.

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

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

Pine Mountain Lake Dam Structure

The Pine Mountain Lake Dam is approximately 45 feet (14 m) long, 6 feet (2 m) high and has a structural volume of cubic yards (0 cubic metres).

Pine Mountain Lake Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 122,120 acre-ft (150,633 Ml) and maximum capacity of 126,737 acre-ft (156,328 Ml).

The surface area of the reservoir is 1,612 acres (652 ha) and the total catchment area is 44 square miles (114 square kilometres).

Pine Mountain Lake Dam Spillway

The dam spillway has a maximum discharge capacity of 1225 cubic feet per second (35 cubic metres per second).

Pine Mountain Lake Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Pine Mountain Lake Dam
Cass, Minnesota
Height (ft)
6
Length (Ft)
45
Storage Volume (acre-ft)
126,737
Drainage Area (sq miles)
44
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

Pine Mountain Lake Dam Weather

Current Conditions at Pine Mountain Lake Dam

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7-Day Forecast for Pine Mountain Lake Dam

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Pine Mountain Lake Dam Frequently Asked Questions

In which state is the Pine Mountain Lake Dam?

Pine Mountain Lake Dam is in Minnesota.

In which county is the Pine Mountain Lake Dam?

Pine Mountain Lake Dam is in Cass County.

How high is the Pine Mountain Lake Dam?

Pine Mountain Lake Dam is 6 feet high.

How long is the Pine Mountain Lake Dam?

Pine Mountain Lake Dam is 45 feet long.

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More Dams in Cass County:

Beaver Lake Dam
Gull Dam
Harrisonville City Lake Dam
Lake Hattie Dam
Leech Dam
Maple River Dam
Maple River Dam (T-180)
Mud-Goose Lake Dam
Oakley Dam
Pine Mountain Lake Dam
Prairie Lake Dam
Raintree Lake Dam
Six Mile Creek Dam
Sylvan Dam
Washburn Lake Dam
Weeping Water Creek 8-A Dam
Willow River Dam
Winnibigoshish 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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