Rex Hoffman Gss 1 Reservoir Report
Nearby: Switzer Al Mossburg
Last Updated: December 5, 2025
Located in Custer County, Oklahoma, the Rex Hoffman Gss 1 dam is a privately owned structure designed by the USDA NRCS with a primary purpose categorized as 'Other.' Completed in 2000, this earth dam stands at a height of 33.5 feet and has a length of 381 feet, creating a storage capacity of 40.07 acre-feet.
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Summary
The dam is situated on Deer Creek, with a drainage area of 127 square miles and a maximum discharge of 124 cubic feet per second.
Despite being classified as having a low hazard potential, the Rex Hoffman Gss 1 dam poses a very high risk due to its condition assessment being not rated. The dam's emergency action plan status and risk management measures are currently unspecified, raising concerns about its ability to withstand potential threats. With the last inspection conducted in July 2011 and a inspection frequency of 5 years, there is a need for updated assessments and preparedness measures to ensure the safety and integrity of this vital water resource structure.
Year Completed |
2000 |
Dam Length |
381 |
Dam Height |
33.5 |
River Or Stream |
DEER CREEK |
Primary Dam Type |
Earth |
Surface Area |
6.71 |
Drainage Area |
127 |
Nid Storage |
40.07 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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.
Rex Hoffman Gss 1