Chain No 8 Reservoir Report
Nearby: Chain No 3 Koehn
Last Updated: January 9, 2026
Chain No 8, located in Dewey, Oklahoma, is a privately owned earth dam designed by the USDA NRCS and completed in 1974.
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Summary
This dam stands at a height of 27 feet with a hydraulic height of 23 feet, serving as a vital structure on the TR-LONE CR river. With a storage capacity of 90 acre-feet and a maximum discharge of 1250 cubic feet per second, Chain No 8 plays a crucial role in water resource management in the region.
Managed by the OWRB, this dam has a controlled spillway and is equipped with a valve outlet gate. Despite being rated as having a low hazard potential, the risk assessment for Chain No 8 is classified as very high (1), highlighting the importance of regular inspections and maintenance. While the condition assessment is currently listed as "Not Rated," the dam's risk management measures and emergency action plan status remain unspecified, emphasizing the need for ongoing monitoring and preparedness in the face of potential climate-related challenges.
As a key component of the water infrastructure in Tulsa District, Chain No 8 underscores the intersection of water resource management and climate resilience. With its significant storage capacity and strategic location, this dam serves as a critical tool for mitigating flood risks and ensuring the sustainable use of water resources in the area. The data on Chain No 8 provides valuable insights for water resource and climate enthusiasts, highlighting the intricate network of structures and agencies involved in safeguarding our water supply in an ever-changing environment.
Year Completed |
1974 |
Dam Length |
336 |
Dam Height |
27 |
River Or Stream |
TR-LONE CR |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
23 |
Nid Storage |
90 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Chain No 8