Speaks Gss No.1 Reservoir Report
Last Updated: December 13, 2025
Speaks Gss No.1 is a privately owned earth dam located in Garvin County, Oklahoma, along the TR-ROCK CREEK stream.
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Summary
Built in 1975 by the USDA NRCS, this dam stands at a height of 34 feet and has a storage capacity of 75 acre-feet. The dam is regulated by the Oklahoma Water Resources Board (OWRB) and undergoes regular inspections to ensure its safety and compliance with state regulations.
Despite being classified as having a low hazard potential, Speaks Gss No.1 is considered to have a very high risk rating, with a risk assessment score of 1. The dam features a controlled spillway and a single valve outlet gate. Its condition is currently not rated, with the last inspection taking place in May 2010. While the dam has not been modified in recent years, it is essential for water resource and climate enthusiasts to stay informed about its risk management measures and emergency action plans.
Located in the Tulsa District, Speaks Gss No.1 serves a primary purpose as an earth dam for water retention. With a capacity to handle a maximum discharge of 590 cubic feet per second, this structure plays a crucial role in managing water flow along TR-ROCK CREEK. As efforts to mitigate climate change intensify, the maintenance and safety of dams like Speaks Gss No.1 become increasingly vital for water resource management and environmental sustainability in Oklahoma.
Year Completed |
1975 |
Dam Length |
200 |
Dam Height |
34 |
River Or Stream |
TR-ROCK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
34 |
Nid Storage |
75 |
Structural Height |
34 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
327cfs |
Walnut Creek At Purcell
|
28cfs |
Canadian River At Purcell
|
201cfs |
North Criner Creek Near Criner
|
1cfs |
Rock Creek At Sulphur
|
8cfs |
Washita River At Alex
|
236cfs |
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.
Speaks Gss No.1