Como Dam, Montana, USA

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Quick Facts About Como Dam

Location: Ravalli, Montana
Coordinates: 46.065, -114.2355
River: Rock Creek River
Primary Purpose: Irrigation
Type: Earth
Commissioned: 1910
Dam Height: 70 ft (21 m)
Dam Length: 2,550 ft (777 m)
Dam Capacity: 40,700 acre-ft (50,203 Ml)
Condition Assessment: Not Available

Como Dam Map

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Como Dam Information

Como Dam is an earthen embankment dam located about 16 miles from Hamilton, Ravalli, Montana.

The dam, which is on the Rock Creek River, was primarily built for Irrigation purposes, but also serves for benefits.

The dam was designed by US Bureau of Reclamation and commissioned in 1910 and is currently owned by BITTER ROOT ID;RECLAMATION.

Como Dam Structure

The Como Dam is approximately 2,550 feet (777 m) long, 70 feet (21 m) high and has a structural volume of 1,114,000 cubic yards (851,714 cubic metres).

Como Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 38,495 acre-ft (47,483 Ml) and maximum capacity of 40,700 acre-ft (50,203 Ml).

The surface area of the reservoir is 976 acres (395 ha) and the total catchment area is 55 square miles (142 square kilometres).

Como Dam Spillway

The dam has a 75 feet (23 m) wide uncontrolled spillway with a maximum discharge capacity of 8000 cubic feet per second (227 cubic metres per second).

Como Dam Compared to Four Famous American Dams

Como Dam
Ravalli, Montana
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) 70 730 550 357 216
Length (Ft) 2,550 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 40,700 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 55 167,800 74,100 3,611 108,355

Como Dam Weather

Current Conditions at Como Dam

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7-Day Forecast for Como Dam

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Como Dam Frequently Asked Questions

In which state is the Como Dam?

Como Dam is in Montana.

In which county is the Como Dam?

Como Dam is in Ravalli County.

How high is the Como Dam?

Como Dam is 70 feet high.

How long is the Como Dam?

Como Dam is 2,550 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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