Collier Reservoir Report
Nearby: Rittenhouse Gp-12 Oknoname 059022
Last Updated: December 16, 2025
Collier is a private earth dam located in Harper County, Oklahoma, along the TR Sleeping Bear Creek.
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Summary
Managed by the USDA NRCS, this dam stands at 26 feet high and has a storage capacity of 34 acre-feet. Despite its low hazard potential and moderate risk assessment, Collier has not been rated for its condition and lacks emergency action preparedness measures.
Situated within the Tulsa District, Collier serves as a crucial water resource in the region, particularly for agricultural purposes. With no state regulation or permitting in place, this dam plays a vital role in water management and conservation efforts. While the dam has not undergone recent inspections or condition assessments, its construction and design by the Natural Resources Conservation Service underscores the importance of sustainable infrastructure for water security.
As climate change continues to impact water resources, enthusiasts and stakeholders should monitor Collier and similar structures for potential risks and vulnerabilities. With its uncontrolled spillway and lack of emergency preparedness, there is a need for proactive measures to ensure the safety and sustainability of this essential water infrastructure. Collaborative efforts between private owners, regulatory agencies, and the community will be crucial in enhancing the resilience of Collier and safeguarding water resources for future generations.
Dam Height |
26 |
River Or Stream |
TR SLEEPING BEAR CR |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
34 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River At Woodward
|
68cfs |
Cimarron River Near Buffalo
|
75cfs |
Cimarron River Near Waynoka
|
107cfs |
Cimarron R Near Buttermilk
|
47cfs |
Bluff Creek Nr Buttermilk
|
42cfs |
North Canadian River Near Seiling
|
103cfs |
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.
Collier