Antwine 1 Reservoir Report
Nearby: Mcfarlin D Oknoname 22291
Last Updated: December 16, 2025
Antwine 1 is a private earth dam located in Kay, Oklahoma, with a primary purpose of flood risk reduction.
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Summary
Completed in 1940, the dam stands at 25 feet in height and spans 200 feet in length, with a storage capacity of 50 acre-feet. Situated on the TR-Chickaskia River within the Tulsa District, the dam is regulated by the Oklahoma Water Resources Board and is subject to state permitting, inspection, and enforcement.
Despite its low hazard potential, Antwine 1 is classified as having a very high risk assessment, signaling the need for proactive risk management measures. The dam features a controlled spillway and a single valve outlet gate. While the condition assessment is listed as "Not Rated," the last inspection took place in 2005 with a scheduled frequency of every five years. The dam's emergency action plan status and adherence to guidelines, as well as the preparation of inundation maps, remain unknown.
Overall, Antwine 1 serves as a critical infrastructure for flood control in the region, but its high-risk classification underscores the importance of regular maintenance, monitoring, and emergency preparedness. Its location within a populated area emphasizes the need for effective risk management strategies to ensure the safety of nearby communities in the event of a catastrophic failure. Water resource and climate enthusiasts can appreciate the complexities involved in managing and maintaining such vital infrastructure in the face of evolving environmental challenges.
Year Completed |
1940 |
Dam Length |
200 |
Dam Height |
25 |
River Or Stream |
TR-CHICKASKIA RIV |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
25 |
Nid Storage |
50 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Salt Fork Arkansas River At Tonkawa
|
444cfs |
Chikaskia River Near Blackwell
|
216cfs |
Arkansas R At Arkansas City
|
835cfs |
Arkansas River At Ralston
|
4230cfs |
Black Bear Creek At Pawnee
|
12cfs |
Skeleton Creek At Enid
|
7cfs |
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.
Antwine 1