Nix Glen Reservoir Report
Last Updated: December 15, 2025
Nix Glen, located in Tecumseh, Oklahoma, is a privately owned earth dam constructed in 1974 by the USDA NRCS.
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Summary
This dam on the TR-OPOSSUM CR river has a height of 28 feet and a storage capacity of 70 acre-feet, serving primarily for purposes other than flood control or water supply. Despite being classified as low hazard potential, its risk assessment is considered very high, indicating the need for careful monitoring and management.
The dam features a controlled spillway and a single valve outlet gate for water release. While it has not been inspected since 2011, it is regulated, permitted, and inspected by the Oklahoma Water Resources Board, ensuring compliance with state regulations. The dam's design and construction were overseen by the Natural Resources Conservation Service, emphasizing the importance of sustainable water resource management and climate resilience in the region.
With a risk assessment ranking of 1 (very high), Nix Glen underscores the critical role of proactive risk management and emergency preparedness in safeguarding water resources and infrastructure. Its location in Pottawatomie County highlights the interconnectedness of water systems and the need for coordinated efforts to address climate challenges. As climate enthusiasts and water resource advocates, understanding and monitoring structures like Nix Glen are essential for maintaining the resilience of our water systems in the face of changing environmental conditions.
Year Completed |
1974 |
Dam Length |
388 |
Dam Height |
28 |
River Or Stream |
TR-OPOSSUM CR |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
70 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Nix Glen