Folsom Right Wing Reservoir Report

Last Updated: December 5, 2025

Folsom Right Wing is a crucial water resource structure located in Sacramento, California, along the American River.


°F

°F

mph

Wind

%

Humidity

Summary

Owned and operated by the Bureau of Reclamation, this earth dam was completed in 1955 primarily for flood risk reduction. With a height of 145 feet and a storage capacity of 1,120,000 acre-feet, it plays a significant role in managing water resources in the region. The dam also serves multiple purposes including hydroelectric power generation, irrigation, recreation, and water supply.

The dam has a high hazard potential and a risk assessment rating of 2, indicating the importance of its maintenance and oversight. While the condition assessment is not available, regular inspections by the Bureau of Reclamation ensure its structural integrity and safety. Although the dam does not have a spillway, its design and operational protocols are carefully managed to mitigate any potential risks. Furthermore, the Emergency Action Plan (EAP) for Folsom Right Wing was last revised in January 2020, highlighting the commitment to preparedness for any emergency situations.

Overall, Folsom Right Wing stands as a crucial infrastructure for water management and flood control in the region. With its strategic location on the American River and its multi-purpose functionalities, it is a key asset for ensuring water supply reliability, flood protection, and environmental sustainability. The Bureau of Reclamation's continued oversight and management of this dam demonstrate a commitment to safeguarding the surrounding communities and water resources for future generations.

Year Completed

1955

Dam Length

6700

Dam Height

145

River Or Stream

AMERICAN RIVER

Primary Dam Type

Earth

Surface Area

11180

Hydraulic Height

140

Drainage Area

1570

Nid Storage

1120000

Structural Height

145

Hazard Potential

High

Foundations

Rock

Nid Height

145
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

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.
View more

Area Campgrounds

Location Reservations Toilets
Folsom Right WingBP36 Preview BP36
Folsom Right WingBP35 Preview BP35
Folsom Right WingBP37 Preview BP37
Folsom Right WingBP38 Preview BP38
Folsom Right WingBP43 Preview BP43
Folsom Right WingBP44 Preview BP44