Boulder Lake Dam, Wyoming, USA

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Quick Facts About Boulder Lake Dam

Location: Sublette, Wyoming
Coordinates: 42.8362, -109.7054
River: Boulder Creek River
Primary Purpose: Irrigation
Type: Earth
Commissioned: 1964
Dam Height: 25 ft (8 m)
Dam Length: 380 ft (116 m)
Dam Capacity: 37,800 acre-ft (46,626 Ml)
Hazard Potential: Significant

Boulder Lake Dam Map

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Boulder Lake Dam Information

Boulder Lake Dam is an earthen embankment dam located about 6 miles from Boulder, Sublette, Wyoming.

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

The dam was designed by C L ENDICOT;USDA NRCS and commissioned in 1964 and is currently owned by BOULDER IRRIGATION DISTRICT.

Boulder Lake Dam Structure

The Boulder Lake Dam is approximately 380 feet (116 m) long, 25 feet (8 m) high and has a structural volume of 3,200 cubic yards (2,447 cubic metres).

Boulder Lake Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 22,280 acre-ft (27,482 Ml) and maximum capacity of 37,800 acre-ft (46,626 Ml).

The surface area of the reservoir is 1,676 acres (678 ha) and the total catchment area is 126 square miles (327 square kilometres).

Boulder Lake Dam Spillway

The dam has a 60 feet (18 m) wide uncontrolled spillway with a maximum discharge capacity of 6190 cubic feet per second (175 cubic metres per second).

Boulder Lake Dam Compared to Four Famous American Dams

Boulder Lake Dam
Sublette, Wyoming
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) 25 730 550 357 216
Length (Ft) 380 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 37,800 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 126 167,800 74,100 3,611 108,355

Boulder Lake Dam Weather

Current Conditions at Boulder Lake Dam

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7-Day Forecast for Boulder Lake Dam

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Boulder Lake Dam Frequently Asked Questions

In which state is the Boulder Lake Dam?

Boulder Lake Dam is in Wyoming.

In which county is the Boulder Lake Dam?

Boulder Lake Dam is in Sublette County.

How high is the Boulder Lake Dam?

Boulder Lake Dam is 25 feet high.

How long is the Boulder Lake Dam?

Boulder Lake Dam is 380 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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