Cales C Reservoir Report

Last Updated: December 16, 2025

Cales C is a private earth dam located in Kay County, Oklahoma, specifically in the city of Kaw City.


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Summary

Completed in 1940, this dam serves the primary purpose of water supply and has a normal storage capacity of 67 acre-feet. With a height of 30 feet and a hydraulic height of 27 feet, Cales C is regulated by the Oklahoma Water Resources Board and undergoes regular state inspections, enforcement, and permitting processes to ensure its structural integrity and compliance with safety standards.

The dam features a controlled spillway and an outlet gate with valve controls. Despite its low hazard potential, Cales C is categorized as having a very high risk due to its location and potential impact on the surrounding area in case of an emergency. The dam has not been rated for its condition assessment, and its last inspection was conducted in May 2011. Water resource enthusiasts and climate advocates may find interest in monitoring the risk management measures and updates on Cales C to ensure its continued safety and functionality in providing water supply to the region.

Overall, Cales C stands as a crucial infrastructure for water resource management in the area, with a history dating back to the early 1940s. Its location along the TR-Kaw Lake and its association with the Tulsa District of the US Army Corps of Engineers highlight its significance in supporting the community's water supply needs. As climate change impacts water resources, the maintenance and monitoring of dams like Cales C become increasingly important for ensuring water security and resilience in the face of evolving environmental challenges.

Year Completed

1940

Dam Length

200

Dam Height

30

River Or Stream

TR-KAW LAKE

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

27

Nid Storage

120

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.