Folsom Dike 7 Reservoir Report

Last Updated: December 5, 2025

Folsom Dike 7, located in Sacramento, California, serves as a critical flood risk reduction structure along the American River.


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Summary

Built in 1956, this earth dam stands at a height of 35 feet and spans a length of 890 feet, providing essential protection to the surrounding area. Managed by the Bureau of Reclamation, Folsom Dike 7 also supports hydroelectric, irrigation, recreation, and water supply purposes, showcasing its versatility in water resource management.

With a storage capacity of 1,120,000 acre-feet, Folsom Dike 7 plays a pivotal role in managing water levels during periods of high discharge. Despite its age, the dam is well-maintained by the Bureau of Reclamation, ensuring its effectiveness in mitigating flood risks. The dam's hazard potential is classified as high, emphasizing the importance of regular inspections and risk management measures to safeguard the surrounding community.

As part of a network of 11 associated structures, Folsom Dike 7 stands as a testament to effective water resource management and flood control in the region. Its strategic location and design make it a key component in the overall water infrastructure, highlighting the importance of sustainable practices in addressing climate change impacts on water resources. For water resource and climate enthusiasts, Folsom Dike 7 represents a critical piece of infrastructure that plays a vital role in protecting communities and supporting various water-related activities in the Sacramento area.

Year Completed

1956

Dam Length

890

Dam Height

35

River Or Stream

AMERICAN RIVER

Primary Dam Type

Earth

Surface Area

11180

Hydraulic Height

30

Drainage Area

1570

Nid Storage

1120000

Structural Height

35

Hazard Potential

High

Foundations

Rock

Nid Height

35
       
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.
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Area Campgrounds

Location Reservations Toilets
Folsom Dike 7BP36 Preview BP36
Folsom Dike 7BP35 Preview BP35
Folsom Dike 7BP37 Preview BP37
Folsom Dike 7BP38 Preview BP38
Folsom Dike 7BP43 Preview BP43
Folsom Dike 7BP44 Preview BP44