Terminal Reservoir Report

Last Updated: December 5, 2025

Terminal, also known as Terminal South Dike, is a Federal-owned structure located in Solano, California, designed for irrigation purposes along the Green Valley OS river.


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Summary

Built in 1958, this Earth-type dam stands at 24 feet tall with a hydraulic height of 21 feet and a structural height of 28 feet. Managed by the Bureau of Reclamation, Terminal has a low hazard potential and a high risk assessment level of 2.

Despite its relatively low hazard potential, Terminal plays a crucial role in providing irrigation water to the surrounding area. With a storage capacity of 119 acre-feet and a length of 500 feet, this dam ensures a stable water supply for agricultural activities. The Bureau of Reclamation oversees the operations, inspections, and regulatory aspects of Terminal, ensuring its continued functionality and safety for the community.

Terminal's last inspection date was in September 2020, with a scheduled inspection frequency of every 6 years. While the condition assessment is currently marked as "Not Available", the risk management measures and emergency preparedness protocols for the dam are yet to be fully detailed. As climate change continues to impact water resources, structures like Terminal will be vital in maintaining water security and resilience in the face of evolving environmental challenges.

Year Completed

1958

Dam Length

500

Dam Height

24

River Or Stream

GREEN VALLEY OS

Primary Dam Type

Earth

Hydraulic Height

21

Nid Storage

119

Structural Height

28

Hazard Potential

Low

Foundations

Rock

Nid Height

28
       
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.