Cimarex Earthen Dam Reservoir Report

Last Updated: December 15, 2025

Cimarex Earthen Dam, located in Geary, Oklahoma, is a privately-owned structure designed by SMITH ROBERTS BALDISCHWILER INC.


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Summary

The dam stands at a height of 30 feet and has a primary purpose of recreation. Completed in 2011, the dam boasts a storage capacity of 338.91 acre-feet and a surface area of 19 acres. It is regulated by the Oklahoma Water Resources Board and undergoes regular inspections to ensure its structural integrity.

The dam's spillway type is controlled, with a width of 12 feet, and a maximum discharge capacity of 717.38 cubic feet per second. It is situated on an unnamed tributary to the North Canadian River, serving as a vital water resource for the surrounding area. Despite its significant hazard potential, the dam's condition assessment remains satisfactory, with a risk assessment rating of very high. Emergency action plans are in place, although specific details regarding their preparation and guidelines adherence are not provided in the data.

Overall, Cimarex Earthen Dam stands as a key recreational and water management structure in Canadian County, Oklahoma. Its strategic location and design make it a valuable asset for water enthusiasts and climate conservation efforts in the region. Ongoing risk management measures and regular inspections reflect a commitment to ensuring the safety and functionality of the dam for both recreational and water resource purposes.

Year Completed

2011

Dam Length

427

Dam Height

30

River Or Stream

UNNAMED TRI. TO N. CANADIAN RIVER

Primary Dam Type

Earth

Surface Area

19

Hydraulic Height

25

Drainage Area

0.06

Nid Storage

338.91

Structural Height

30

Hazard Potential

Significant

Nid Height

30
       
Seasonal Comparison

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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.