Scs-Maysville Laterals Site-L1 Reservoir Report
Last Updated: December 14, 2025
The SCS-Maysville Laterals Site-L1 is a state-regulated earth dam located in Garvin, Oklahoma, with a primary purpose of flood risk reduction along the TR-Washita River.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1973 by the USDA NRCS, this dam stands at a height of 23 feet and has a length of 1090 feet, providing a storage capacity of 183 acre-feet for floodwater mitigation. The dam is classified as having a significant hazard potential with a fair condition assessment as of August 2011.
Managed by the OWRB, the SCS-Maysville Laterals Site-L1 is equipped with a controlled spillway and one valve outlet gate for controlled water release. Despite its fair condition, the dam has a very high risk rating and undergoes inspections every three years to ensure its structural integrity and operational effectiveness. With a notable presence in the Tulsa District, this dam plays a crucial role in protecting the surrounding area from flooding events, highlighting the importance of effective water resource management and climate resilience in the region.
For water resource and climate enthusiasts, the SCS-Maysville Laterals Site-L1 serves as a key infrastructure piece in Oklahoma's flood risk reduction efforts. Its location near the TR-Washita River in Garvin County underscores the critical role it plays in safeguarding the local community from potential inundation events. With its significant hazard potential and very high risk rating, this earth dam stands as a testament to the ongoing challenges and responsibilities associated with managing water resources and adapting to changing climate conditions.
Year Completed |
1973 |
Dam Length |
1090 |
Dam Height |
23 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
23 |
Nid Storage |
183 |
Structural Height |
23 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
23 |
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-L1