Scs-Maysville Laterals Site-H09c Reservoir Report
Last Updated: December 13, 2025
SCS-Maysville Laterals Site-H09c is a state-regulated dam located in Garvin, Oklahoma, specifically in the city of Maysville.
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Summary
Built in 1972 by the USDA NRCS, this earth dam stands at a height of 25 feet and has a length of 1040 feet, providing flood risk reduction along the TR-Washita River. With a storage capacity of 168 acre-feet and a normal storage of 28 acre-feet, this dam plays a crucial role in managing water resources in the area.
The dam features a controlled spillway and an outlet gate for water release, with a maximum discharge capacity of 300 cubic feet per second. Despite being classified as a low hazard potential structure, this dam is considered to have a very high risk rating, emphasizing the need for effective risk management measures. While the condition assessment is currently not rated, regular inspections are conducted, with the last one dating back to 1980.
As climate change continues to impact water resources and extreme weather events become more frequent, structures like SCS-Maysville Laterals Site-H09c play a vital role in mitigating flood risks and ensuring the safety of surrounding communities. With its state regulation, inspection, and enforcement in place, this dam serves as a critical infrastructure for water management in Oklahoma, under the oversight of the OWRB.
Year Completed |
1972 |
Dam Length |
1040 |
Dam Height |
25 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
25 |
Nid Storage |
168 |
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 |
North Criner Creek Near Criner
|
1cfs |
Walnut Creek At Purcell
|
28cfs |
Canadian River At Purcell
|
201cfs |
Washita River At Alex
|
236cfs |
Little Washita River East Of Ninnekah
|
18cfs |
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-H09c