Little Grass Valley Dam, California, USA

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Quick Facts About Little Grass Valley Dam

Location: Plumas, California
Coordinates: 39.725, -121.0201
River: South Fork Feather River
Primary Purpose: Hydroelectric
Type: Earth Rockfill
Commissioned: 1961
Dam Height: 184 ft (56 m)
Dam Length: 840 ft (256 m)
Dam Capacity: 94,660 acre-ft (116,761 Ml)
Condition Assessment: Not Available

Little Grass Valley Dam Map

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Little Grass Valley Dam Information

Little Grass Valley Dam is an earth rockfill dam located about 13 miles from Golden Trout Crossing, Plumas, California.

The dam, which is on the South Fork Feather River, was primarily built for Hydroelectric purposes, but also serves for Irrigation and Water Supply benefits.

The dam was designed by Bechtel and commissioned in 1961 and is currently owned by South Feather Water and Power Agency.

Little Grass Valley Dam Structure

The Little Grass Valley Dam is approximately 840 feet (256 m) long, 184 feet (56 m) high and has a structural volume of 834,000 cubic yards (637,639 cubic metres).

Little Grass Valley Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 93,010 acre-ft (114,726 Ml) and maximum capacity of 94,660 acre-ft (116,761 Ml).

The surface area of the reservoir is 1,630 acres (660 ha) and the total catchment area is 26 square miles (67 square kilometres).

Little Grass Valley Dam Spillway

The dam has a 80 feet (24 m) wide controlled spillway with a maximum discharge capacity of cubic feet per second (0 cubic metres per second).

Little Grass Valley Dam Compared to Four Famous American Dams

Little Grass Valley Dam
Plumas, California
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) 184 730 550 357 216
Length (Ft) 840 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 94,660 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 26 167,800 74,100 3,611 108,355

Little Grass Valley Dam Weather

Current Conditions at Little Grass Valley Dam

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7-Day Forecast for Little Grass Valley Dam

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Little Grass Valley Dam Frequently Asked Questions

In which state is the Little Grass Valley Dam?

Little Grass Valley Dam is in California.

In which county is the Little Grass Valley Dam?

Little Grass Valley Dam is in Plumas County.

How high is the Little Grass Valley Dam?

Little Grass Valley Dam is 184 feet high.

How long is the Little Grass Valley Dam?

Little Grass Valley Dam is 840 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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