Acres Jacob Reservoir Report

Last Updated: December 9, 2025

Acres Jacob is a privately owned dam located in Norman, Oklahoma, along the TR-FOURMILE CREEK.


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Summary

Built in 1960, this earth dam stands at 30 feet high with a length of 300 feet, providing a storage capacity of 110 acre-feet for recreational purposes. The dam has a controlled spillway and a single valve outlet gate.

Despite being classified as having a low hazard potential, Acres Jacob is considered to have a very high risk due to its condition not being rated and lacking an emergency action plan. The last inspection of the dam was conducted in July 2005, with an inspection frequency of every 5 years. The dam is under the regulatory jurisdiction of the Oklahoma Water Resources Board (OWRB), ensuring that it undergoes regular inspections, permitting, and enforcement to maintain safety standards.

For water resource and climate enthusiasts, Acres Jacob presents an opportunity to explore the intersection of human-made infrastructure and environmental risk management. This dam serves as a recreational resource but also highlights the importance of regular maintenance and emergency preparedness to mitigate potential risks associated with dam failure. Its location in Canadian County, Oklahoma, and proximity to a major waterway underscore the significance of understanding and monitoring the condition of such structures in the face of changing climate patterns.

Year Completed

1960

Dam Length

300

Dam Height

30

River Or Stream

TR-FOURMILE CREEK

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

30

Nid Storage

110

Structural Height

30

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.