Fullerton Dam Reservoir Report

Last Updated: December 5, 2025

Fullerton Dam, also known as Fullerton Reservoir, is a federal-owned structure located in Orange County, California.


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Summary

Built by the US Army Corps of Engineers in 1941, the primary purpose of the dam is flood risk reduction along the East Fullerton Creek. Standing at 46 feet tall and 575 feet long, the dam has a storage capacity of 1342 acre-feet and a maximum discharge of 3640 cubic feet per second.

The dam's uncontrolled spillway and high hazard potential necessitate regular inspections and risk management measures by the US Army Corps of Engineers. Despite the limited capacity to store water, the dam plays a crucial role in managing water levels and alleviating pressure during severe weather events. The Corps works closely with local emergency managers and the public to raise awareness and ensure preparedness for any potential dam-related emergencies, including maintaining an updated emergency action plan and conducting regular maintenance and repairs.

As a notable feature in the area, Fullerton Dam serves not only as a flood risk reduction structure but also provides recreational opportunities. Its ongoing risk assessment and management efforts aim to enhance public safety and ensure the dam's structural integrity for years to come.

Year Completed

1941

Dam Length

575

Dam Height

46

River Or Stream

EAST FULLERTON CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

37

Drainage Area

5

Nid Storage

1342

Outlet Gates

Vertical Lift - 0

Hazard Potential

High

Nid Height

46
       
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.