San Bernard Reservoir No 1 Reservoir Report
Last Updated: December 5, 2025
San Bernard Reservoir No 1, located in Brazoria, Texas, is a privately owned water resource that plays a crucial role in the region's water management.
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Summary
Built in 1957, this earth dam stands at a height of 27 feet and has a storage capacity of 3,375 acre-feet. The reservoir, situated off the San Bernard River, serves multiple purposes and is regulated by the Texas Commission on Environmental Quality (TCEQ). The dam, designed by Edward Caswell, underwent structural modifications in 1979 to ensure its continued functionality.
Despite being categorized as having a fair condition assessment, San Bernard Reservoir No 1 is considered to have a high risk potential (2) and is subject to regular inspections every five years. The dam has two uncontrolled outlet gates and does not feature a spillway. While the hazard potential for this reservoir is not available, its risk management measures and emergency action plan status are also unspecified. With a capacity for 3,160 acre-feet of normal storage and a length of 13,800 feet, this reservoir remains a significant water resource in the region, contributing to its water supply and management efforts.
For water resource and climate enthusiasts, San Bernard Reservoir No 1 presents an intriguing case study of a privately owned dam in Texas with a history dating back to the mid-20th century. As a key element in the region's water infrastructure, this reservoir showcases the importance of regular inspections, risk assessments, and maintenance to ensure its continued safety and functionality. With its unique design characteristics and regulatory oversight by TCEQ, San Bernard Reservoir No 1 serves as a valuable asset in the management of water resources in Brazoria County, Texas.
Years Modified |
1979 - Structural |
Year Completed |
1957 |
Dam Length |
13800 |
Dam Height |
27 |
River Or Stream |
OFF CH-SAN BERNARD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
3375 |
Structural Height |
27 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Bernard Rv Nr Boling
|
136cfs |
Brazos Rv Nr Rosharon
|
2110cfs |
Colorado Rv Nr Bay City
|
2670cfs |
Big Ck Nr Needville
|
45cfs |
Colorado Rv At Wharton
|
333cfs |
Dry Ck Nr Rosenberg
|
84cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
San Bernard Reservoir No 1