Mossburg Reservoir Report
Nearby: Switzer Al Rex Hoffman Gss 1
Last Updated: December 5, 2025
Mossburg is a privately owned dam located in Custer County, Oklahoma, specifically in the city of Hydro.
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Summary
Completed in 1967, this earth-core stone dam stands at a height of 27 feet and has a storage capacity of 60 acre-feet. The primary purpose of Mossburg is classified as "Other", serving a variety of functions in water resource management.
Managed by the Oklahoma Water Resources Board (OWRB), Mossburg is regulated, permitted, inspected, and enforced by the state agencies. Despite being categorized as having a low hazard potential, Mossburg is considered to have a high risk due to its condition assessment not being rated and its risk assessment being classified as "Very High (1)". The dam has a controlled spillway with a width of 1 foot and is equipped with one valve as an outlet gate.
With its location on TR-Deer Creek and under the jurisdiction of the Tulsa District of the US Army Corps of Engineers, Mossburg provides an important water resource for the region. Climate and water resource enthusiasts would find Mossburg an intriguing structure with its unique design and risk management challenges.
Year Completed |
1967 |
Dam Length |
270 |
Dam Height |
27 |
River Or Stream |
TR-DEER CR |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
25 |
Nid Storage |
60 |
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.
Mossburg