Eck Twin Lakes South Reservoir Report
Nearby: Eck Twin Lakes North Oknoname 093014
Last Updated: December 5, 2025
Eck Twin Lakes South is a privately owned earth dam located in Major County, Oklahoma, near the city of Fairview.
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Summary
Completed in 1952, this dam stands at a height of 25 feet and has a capacity of 150 acre-feet for storage. The primary purpose of this dam is for other recreational activities, with a controlled spillway and a low hazard potential rating.
Managed by the Oklahoma Water Resources Board, Eck Twin Lakes South is regulated, permitted, inspected, and enforced by the state agency. The dam is situated along TR-Cottonwood Creek and has a surface area of 9 acres. Despite being not rated for its condition assessment, this dam is considered to have a very high risk due to its age and potential consequences of failure. Water resource and climate enthusiasts will find Eck Twin Lakes South to be an interesting structure with its historical significance and its role in providing recreational opportunities for the local community.
Year Completed |
1952 |
Dam Length |
900 |
Dam Height |
25 |
River Or Stream |
TR-COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
25 |
Nid Storage |
150 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
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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.
Eck Twin Lakes South