Oknoname 049020 Reservoir Report
Last Updated: December 12, 2025
Oknoname 049020 is a privately owned earth dam located in Garvin, Oklahoma, near the city of Wynnewood.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1956, this dam stands at a height of 20 feet and has a storage capacity of 120 acre-feet. It serves as a crucial structure for controlling the flow of the TR-Little Peavine Creek, with a controlled spillway and a maximum discharge of 320 cubic feet per second.
Managed by the Oklahoma Water Resources Board, Oknoname 049020 is classified as having a low hazard potential but a very high risk assessment rating. Despite not being currently rated for its condition, this dam undergoes inspections every five years to ensure its safety and integrity. While it is primarily used for purposes other than flood control or water supply, its presence is vital for the surrounding area's water resource management and climate resilience.
Located within the Tulsa District and under the jurisdiction of the state of Oklahoma, Oknoname 049020 plays a crucial role in the region's water infrastructure. With its stone core and soil foundation, this dam stands as a testament to the engineering expertise of its time and continues to be a key asset in safeguarding the local community against potential water-related risks.
Year Completed |
1956 |
Dam Length |
800 |
Dam Height |
20 |
River Or Stream |
TR-LITTLE PEAVINE CREEK |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
16 |
Nid Storage |
120 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Oknoname 049020