Carter Lake Reservoir Report
Nearby: Banion John O No 10 Madill City Lake
Last Updated: December 6, 2025
Carter Lake, located in Madill, Oklahoma, is a vital water supply reservoir owned by the local government and regulated by the Oklahoma Water Resources Board.
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Summary
Built in 1936, this earth dam structure stands at 44 feet high and stretches 1000 feet in length, with a storage capacity of 2400 acre-feet and a surface area of 85 acres. The reservoir serves as a tributary of Glasses Creek and plays a crucial role in providing water to the surrounding area, with a maximum discharge capacity of 1600 cubic feet per second.
Despite its age, Carter Lake has been well-maintained, with a fair condition assessment and a high hazard potential. Regular inspections are conducted, with the last one taking place in December 2021. The reservoir boasts a controlled spillway and a single valve outlet gate. However, it is noted to have a very high risk level, emphasizing the importance of ongoing risk management measures to ensure its continued safe operation. With its picturesque location and significant impact on the local water supply, Carter Lake is a noteworthy site for water resource and climate enthusiasts to monitor and appreciate.
Year Completed |
1936 |
Dam Length |
1000 |
Dam Height |
44 |
River Or Stream |
TRIBUTARY OF GLASSES CREEK |
Primary Dam Type |
Earth |
Surface Area |
85 |
Hydraulic Height |
44 |
Drainage Area |
1.81 |
Nid Storage |
2400 |
Structural Height |
44 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
44 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Dickson
|
317cfs |
Pennington Creek Near Reagan
|
7cfs |
Blue River Near Connerville
|
54cfs |
Red River At Denison Dam Nr Denison
|
44cfs |
Rock Creek At Sulphur
|
8cfs |
Blue River Near Blue
|
58cfs |
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.
Carter Lake