Terryland Farm Inc. Reservoir Report
Nearby: Oknoname 30172 Thomas Eddie E.
Last Updated: December 20, 2025
Terryland Farm INC., located in Harper, Oklahoma, is a privately owned dam structure regulated by the Oklahoma Water Resources Board.
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Summary
The dam, completed in 1960, serves a variety of purposes and stands at a height of 20 feet with a length of 520 feet. It has a storage capacity of 70 acre-feet and is situated along the Cimmaron River, making it a key feature in managing water resources in the area.
With a controlled spillway and a maximum discharge of 400 cubic feet per second, Terryland Farm INC. plays a crucial role in managing flood risk and ensuring water availability for agriculture and other uses in the region. Despite being rated as having a very high risk potential, the dam's condition remains unrated, suggesting a need for ongoing monitoring and maintenance to ensure its continued effectiveness in the face of climate variability and changing water resource demands.
As climate change continues to impact water resources, the importance of structures like Terryland Farm INC. in managing water flows and mitigating flood risk will only increase. With a history of state regulation and inspection, the dam stands as a testament to the importance of proactive management in adapting to a changing climate and ensuring the sustainability of water resources for future generations.
Year Completed |
1960 |
Dam Length |
520 |
Dam Height |
20 |
River Or Stream |
CIMMARON RIVER |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
20 |
Nid Storage |
70 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Undetermined |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Crooked C Nr Englewood
|
7cfs |
Cimarron River Near Forgan
|
19cfs |
Cimarron R Near Buttermilk
|
46cfs |
Bluff Creek Nr Buttermilk
|
41cfs |
Beaver River At Beaver
|
0cfs |
Cimarron River Near Buffalo
|
73cfs |
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.
Terryland Farm Inc.