Marvin D Brogan Reservoir Report
Nearby: Oknoname 30145 Brogan Dam
Last Updated: December 6, 2025
Marvin D Brogan is a flood risk reduction structure located along the Washita River in Oklahoma, designed by NRCS and owned by Tribal Government.
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Summary
With a height of 14.1 feet and a storage capacity of 50 acre-feet, this dam serves the primary purpose of flood risk reduction. Despite its low hazard potential and "Very High" risk assessment rating, the structure is not currently rated for its condition and has not undergone recent inspections.
Situated within the Tulsa District, Marvin D Brogan is a controlled spillway dam with a surface area of 1 acre and a drainage area of 0.57 square miles. While it does not have associated locks or outlet gates, the structure has been deemed to have a very high risk profile. Although it is not state-regulated, located in Washita County, Oklahoma, this dam underscores the importance of water resource management and climate resilience efforts in the region.
For water resource and climate enthusiasts, Marvin D Brogan presents a unique case study of a flood control structure in a high-risk area. With its significant storage capacity and location along the Washita River, this dam highlights the importance of proactive risk management and infrastructure maintenance to ensure the safety and sustainability of water resources in Oklahoma. As climate change continues to impact water systems, structures like Marvin D Brogan will play a crucial role in mitigating flood risks and protecting communities in the region.
Dam Height |
14.1 |
River Or Stream |
WASHITA RIVER |
Surface Area |
1 |
Drainage Area |
0.57 |
Nid Storage |
50 |
Hazard Potential |
Low |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cobb Creek Near Eakly
|
16cfs |
Lake Creek Near Eakly
|
4cfs |
Willow Creek Near Albert
|
2cfs |
Cobb Creek Near Fort Cobb
|
4cfs |
Washita River Near Clinton
|
32cfs |
Canadian River At Bridgeport
|
126cfs |
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.
Marvin D Brogan