Robbins Roy L Reservoir Report
Nearby: Heiman Ed H Feaster
Last Updated: December 18, 2025
Robbins Roy L is a privately owned dam located in Ralston, Oklahoma, on the TR-ARKANSAS RIVER.
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Summary
Constructed in 1950, this earth dam stands at a height of 20 feet and has a length of 480 feet, providing a storage capacity of 80 acre-feet. The dam is primarily used for purposes other than flood control or water supply, with a spillway type classified as controlled and a hazard potential rated as low.
Despite its low hazard potential, Robbins Roy L is under state regulation and enforcement by the Oklahoma Water Resources Board (OWRB), with regular inspections conducted every five years. The dam's risk assessment is categorized as very high, indicating potential vulnerabilities that may require management measures in the future. The dam features a single valve outlet gate for water release, and its condition assessment is currently not rated, suggesting a need for further evaluation to ensure its structural integrity and safety.
For water resource and climate enthusiasts, Robbins Roy L presents an intriguing case study in dam management and risk assessment. Located in a high-risk area with a very high risk classification, this privately owned structure on the TR-ARKANSAS RIVER serves as a reminder of the importance of regular inspections and maintenance to mitigate potential hazards. With its low hazard potential but high risk assessment, Robbins Roy L highlights the complex interplay between infrastructure development, environmental factors, and regulatory oversight in ensuring the safety and sustainability of water resources in Oklahoma.
Year Completed |
1950 |
Dam Length |
480 |
Dam Height |
20 |
River Or Stream |
TR-ARKANSAS RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
20 |
Nid Storage |
80 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Arkansas River At Ralston
|
4130cfs |
Black Bear Creek At Pawnee
|
5cfs |
Hominy Creek Near Hominy
|
2cfs |
Salt Fork Arkansas River At Tonkawa
|
372cfs |
Chikaskia River Near Blackwell
|
193cfs |
Cimarron River Near Ripley
|
464cfs |
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.
Robbins Roy L