Smith Bros Gss #1 Reservoir Report
Last Updated: December 14, 2025
Smith Bros Gss #1 is a privately owned earth dam located in Garvin, Oklahoma, with a primary purpose of debris control.
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Summary
Constructed by the USDA NRCS in 1977, this dam stands at a height of 20 feet and has a length of 1040 feet, providing a storage capacity of 122 acre-feet. With a low hazard potential and a moderate risk assessment rating, Smith Bros Gss #1 is an essential structure for managing water resources in the area.
Although not regulated by the state or federal agencies, this dam plays a crucial role in controlling the flow of water and protecting downstream areas from debris. The uncontrolled spillway with a width of 100 feet ensures the safe release of excess water during periods of high flow. The risk management measures for this dam are currently not specified, indicating a need for further evaluation and potential enhancements to ensure its long-term functionality and safety.
Overall, Smith Bros Gss #1 serves as a significant asset for water resource management in the region, providing essential debris control and storage capacity. With its strategic location and design features, this dam plays a vital role in mitigating potential risks and ensuring the safety of nearby communities. As climate change continues to impact water resources, structures like Smith Bros Gss #1 will become increasingly important in safeguarding against floods and other water-related hazards.
Year Completed |
1977 |
Dam Length |
1040 |
Dam Height |
20 |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
20 |
Drainage Area |
0.25 |
Nid Storage |
122 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
327cfs |
Walnut Creek At Purcell
|
28cfs |
North Criner Creek Near Criner
|
1cfs |
Canadian River At Purcell
|
201cfs |
Washita River At Alex
|
236cfs |
Canadian River At Norman
|
213cfs |
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.
Smith Bros Gss #1