Grider Gss No.1 Reservoir Report
Last Updated: December 14, 2025
Grider Gss No.1 is a private earth dam located in Pauls Valley, Oklahoma, along the TR-Washington Creek.
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Summary
Built in 1975 by the USDA NRCS, this structure stands at a height of 21 feet and spans 625 feet in length. It serves a primary purpose that falls under "Other" category and is regulated by the Oklahoma Water Resources Board (OWRB). The dam has a storage capacity of 130 acre-feet and a maximum discharge rate of 590 cubic feet per second.
Despite being classified as having low hazard potential, Grider Gss No.1 presents a very high risk level due to its condition assessment not being rated. The dam features a controlled spillway with a width of 1 foot and one valve outlet gate. With a history of regular inspections every 5 years, the last inspection was conducted in April 2010. The risk assessment indicates the need for robust risk management measures to ensure the safety and integrity of the structure.
For water resource and climate enthusiasts, Grider Gss No.1 serves as a unique case study in dam engineering and management. Its location in Garvin County, Oklahoma, and association with the Tulsa District of the US Army Corps of Engineers add to its significance in the realm of water infrastructure. As discussions around water security and climate resilience continue to gain prominence, understanding the design, operation, and risk factors of structures like Grider Gss No.1 becomes crucial for sustainable water resource management in the region.
Year Completed |
1975 |
Dam Length |
625 |
Dam Height |
21 |
River Or Stream |
TR-WASHINGTON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
130 |
Structural Height |
21 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
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.
Grider Gss No.1