Scs-Maysville Laterals Site-L3 Reservoir Report
Last Updated: December 14, 2025
SCS-Maysville Laterals Site-L3 in Garvin, Oklahoma, managed by the USDA NRCS, is a state-regulated earth dam on the TR-Washita River with a primary purpose of flood risk reduction.
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Summary
Completed in 1971, this dam stands 25 feet tall and spans 740 feet, providing a storage capacity of 155 acre-feet. Despite its low hazard potential, the risk assessment categorizes it as very high, indicating the need for careful monitoring and management.
The dam features a controlled spillway and a single valve outlet gate for water release. Although the last inspection was conducted in 1980, the dam is scheduled for regular inspections every 5 years. The condition assessment is currently not rated, highlighting the importance of periodic evaluations to ensure the structural integrity and safety of the dam. With the potential for high-risk situations, it is essential for emergency action plans to be prepared and updated to meet guidelines and to have proper risk management measures in place.
Located in the Tulsa District and under the jurisdiction of the OWRB, the SCS-Maysville Laterals Site-L3 plays a crucial role in protecting the surrounding area from flooding. With a focus on flood risk reduction, this dam serves as a key infrastructure for water resource management in the region. As climate change continues to impact water resources, it is essential to monitor and maintain structures like this dam to ensure the safety and security of the community and the environment.
Year Completed |
1971 |
Dam Length |
740 |
Dam Height |
25 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
25 |
Nid Storage |
155 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
327cfs |
Walnut Creek At Purcell
|
28cfs |
Canadian River At Purcell
|
201cfs |
North Criner Creek Near Criner
|
1cfs |
Washita River At Alex
|
236cfs |
Canadian River At Norman
|
213cfs |
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.
Scs-Maysville Laterals Site-L3