Miller W.N. Reservoir Report
Nearby: Ownbey Oknoname 30073
Last Updated: December 19, 2025
Located in Harper County, Oklahoma, Miller W.N.
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Summary
is a private earth dam constructed in 1960 by the USDA NRCS. Standing at a height of 28 feet with a length of 480 feet, this dam serves to control the flow of TR-Buffalo Creek, providing vital water resource management in the region. With a maximum storage capacity of 290 acre-feet and a normal storage capacity of 145 acre-feet, Miller W.N. plays a crucial role in regulating water levels and mitigating flood risks in the area.
Managed by the Oklahoma Water Resources Board, Miller W.N. is classified as a low hazard potential structure with a very high risk assessment rating. Despite its age, this dam has not been rated for its condition, and its last inspection was conducted in 2011. With a controlled spillway and a single valve outlet gate, Miller W.N. is equipped to handle maximum discharges of up to 900 cubic feet per second. As climate change continues to impact water resources, the proper maintenance and oversight of structures like Miller W.N. are essential to ensuring water security for both local communities and the environment.
For water resource and climate enthusiasts, Miller W.N. serves as an example of the intricate relationship between infrastructure, natural resources, and climate resilience. As part of the Tulsa District and under the jurisdiction of the OWRB, this earth dam provides a critical link in the region's water management system. With its historical significance and ongoing role in flood control and water storage, Miller W.N. underscores the importance of proactive monitoring, maintenance, and risk assessment for sustainable water resource management in the face of a changing climate.
Year Completed |
1960 |
Dam Length |
480 |
Dam Height |
28 |
River Or Stream |
TR-BUFFALO CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
28 |
Nid Storage |
290 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron R Near Buttermilk
|
46cfs |
Bluff Creek Nr Buttermilk
|
41cfs |
Cimarron River Near Buffalo
|
73cfs |
Crooked C Nr Englewood
|
7cfs |
North Canadian River At Woodward
|
68cfs |
Beaver River At Beaver
|
0cfs |
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.
Miller W.N.