S2 Dam Reservoir Report
Nearby: S1 Dam S4 Sediment Pond Dam
Last Updated: December 5, 2025
S2 Dam, located in Harrison, Texas, is a private-owned structure with a primary purpose classified as "Other." This buttress-type dam stands at a height of 19 feet and has a length of 2050 feet, providing a storage capacity of 273 acre-feet.
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Summary
The dam features two uncontrolled outlet gates and a spillway width of 20 feet, with a maximum discharge capacity of 1195 cubic feet per second.
Despite its moderate hazard potential rating, S2 Dam currently lacks a condition assessment and inspection frequency. The Emergency Action Plan (EAP) was last revised in 2010, indicating a potential need for updated emergency protocols to ensure the safety of surrounding communities in case of a dam failure. The risk assessment for the dam is rated as moderate (3), highlighting the importance of implementing risk management measures to mitigate potential hazards.
As water resource and climate enthusiasts, the S2 Dam serves as a crucial infrastructure for water storage and flood control in the region. With its unique design and operational characteristics, there is a need for enhanced monitoring and maintenance to ensure the dam's structural integrity and safety standards are up to date. It is essential for stakeholders to work collaboratively in implementing risk management strategies and updating emergency response plans to safeguard the surrounding areas in the event of a potential disaster.
Dam Length |
2050 |
Dam Height |
19 |
River Or Stream |
|
Primary Dam Type |
Other |
Hydraulic Height |
19 |
Nid Storage |
273 |
Structural Height |
19 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sabine Rv Nr Beckville
|
946cfs |
Sabine Rv Nr Carthage
|
9200cfs |
Sabine Rv Bl Longview
|
656cfs |
Little Cypress Ck Nr Jefferson
|
358cfs |
Big Cypress Ck Abv Sh 43 Nr Karnack
|
538cfs |
Big Cypress Ck Nr Jefferson
|
97cfs |
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.
S2 Dam