San Diego-Rosita Cks Ws Scs Site 1 Dam Reservoir Report

Last Updated: December 5, 2025

The San Diego-Rosita Creeks Water Supply System Site 1 Dam, located in Duval County, Texas, was completed in 1960 with the primary purpose of flood risk reduction along the San Diego Creek.


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Summary

This earth dam stands at a height of 31 feet and spans a length of 2900 feet, with a maximum storage capacity of 8716 acre-feet and a normal storage capacity of 200 acre-feet. Despite being uncontrolled, the dam has two outlet gates to manage water flow and prevent potential flooding in the area.

Managed by the Natural Resources Conservation Service, the dam is regulated by the Texas Commission on Environmental Quality and undergoes regular inspections, with the most recent assessment in 2018 rating the dam's condition as fair. With a moderate risk assessment and a hazard potential not available, the dam serves as a critical infrastructure to protect the surrounding area from flood events and ensure water resource management in the region. The site is under the jurisdiction of the state and federal agencies, with a focus on maintaining safety and operational efficiency for the community of San Diego.

Year Completed

1960

Dam Length

2900

Dam Height

31

River Or Stream

SAN DIEGO CREEK

Primary Dam Type

Earth

Surface Area

80

Hydraulic Height

31

Drainage Area

23.19

Nid Storage

8716

Structural Height

31

Outlet Gates

Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

31
       
Seasonal Comparison

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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.