Rowell Jerry D Reservoir Report
Last Updated: December 6, 2025
Rowell Jerry D is a privately-owned dam located in Ninnekah, Oklahoma, specifically on TR-ROCK CR.
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Summary
This earth dam, completed in 1950, serves a primary purpose that is classified as "Other" with a height of 25 feet and a length of 600 feet. With a storage capacity of 70 acre-feet and a surface area of 4 acres, Rowell Jerry D is regulated by the Oklahoma Water Resources Board and is subject to state permitting, inspection, and enforcement.
Despite being categorized as a low hazard potential structure, Rowell Jerry D is considered to have a very high risk assessment rating of 1. The dam features a controlled spillway type and a single valve outlet gate. Although the condition assessment is listed as "Not Rated," the last inspection took place in February 2001 with an inspection frequency of every 5 years. The risk management measures, emergency action plan, and other related information are not readily available for this dam.
Located in Grady County, Oklahoma, Rowell Jerry D falls within the jurisdiction of the Tulsa District of the US Army Corps of Engineers. It is essential for water resource and climate enthusiasts to monitor the safety and maintenance of dams like Rowell Jerry D to ensure their structural integrity and prevent potential hazards to surrounding communities and ecosystems.
Year Completed |
1950 |
Dam Length |
600 |
Dam Height |
25 |
River Or Stream |
TR-ROCK CR |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
25 |
Nid Storage |
70 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
Rowell Jerry D