University Mound South Basin Reservoir Report

Last Updated: December 15, 2025

University Mound South Basin is a vital water supply infrastructure located in San Francisco, California.


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Summary

This Earth-type dam, completed in 1937, stands at a height of 61 feet and has a hydraulic height of 59.5 feet. With a storage capacity of 250 acre-feet, this offstream structure plays a crucial role in ensuring water availability for the city. The dam covers an area of 11 acres and is regulated by the Department of Water Resources (DWR) for safety and inspection.

Despite its age, University Mound South Basin maintains a satisfactory condition assessment, with a high hazard potential due to its location. However, regular inspections and enforcement by state regulatory agencies ensure its continued functionality and safety. The dam is associated with the primary purpose of water supply and serves as a crucial component of the local government's water resource management strategy. The structure's last inspection in February 2020 confirms its sound condition, with emergency action plans in place to address any unforeseen events.

For water resource and climate enthusiasts, University Mound South Basin offers a fascinating glimpse into the intersection of infrastructure, water supply, and environmental stewardship. As a key element in San Francisco's water management system, this dam exemplifies the importance of maintaining and regulating critical water resources. Its history, design, and ongoing maintenance provide valuable insights into the challenges and opportunities of sustainable water management in the face of climate change and increasing demand. University Mound South Basin stands as a testament to the crucial role of infrastructure in securing water resources for future generations amidst evolving environmental conditions.

Year Completed

1937

Dam Length

1150

Dam Height

61

River Or Stream

Offstream

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

59.5

Nid Storage

250

Hazard Potential

High

Nid Height

61
       
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.