Oknoname 049002 Reservoir Report
Last Updated: January 12, 2026
Oknoname 049002 is a privately owned earth dam located in Garvin, Oklahoma, along the TR-Washita River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1955, this dam stands at 25 feet tall and spans 700 feet in length, with a storage capacity of 140 acre-feet. The primary purpose of this structure is classified as "Other," with a spillway type of "Controlled" and a hazard potential rated as "Low." Despite its low hazard potential, the risk assessment for Oknoname 049002 is marked as "Very High (1)," indicating the need for careful monitoring and management.
Managed by the Oklahoma Water Resources Board, this dam is regulated, permitted, inspected, and enforced by the state agency. Its condition is currently marked as "Not Rated," with the last inspection conducted in April 2010 and an inspection frequency of every 5 years. One valve serves as the outlet gate for this dam, and it is situated within the Tulsa District. The risk management measures, emergency action plan, and inundation maps for this structure are currently not available, highlighting the importance of further preparedness and monitoring for potential emergencies.
Despite its relatively low hazard potential, Oknoname 049002 poses a significant risk that necessitates vigilant monitoring and management. As a vital component of water resource infrastructure in Oklahoma, this earth dam serves a crucial role in controlling the flow of the TR-Washita River. With a storage capacity of 140 acre-feet, it is essential to ensure that proper safety measures are in place, especially given the very high risk assessment rating. By staying informed and prepared, stakeholders can work towards maintaining the integrity and safety of this important water resource structure.
Year Completed |
1955 |
Dam Length |
700 |
Dam Height |
25 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
25 |
Nid Storage |
140 |
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
|
350cfs |
Walnut Creek At Purcell
|
31cfs |
Canadian River At Purcell
|
235cfs |
North Criner Creek Near Criner
|
1cfs |
Washita River At Alex
|
273cfs |
Canadian River At Norman
|
234cfs |
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 049002