Diamond Sevens Reservoir Report

Last Updated: December 5, 2025

Diamond Sevens is a private dam located in Claremore, Oklahoma, with a primary purpose of recreation.


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Summary

Completed in 2004, this Earth dam stands at 97 feet high and spans 2400 feet in length, with a storage capacity of 6750 acre-feet. The dam overlooks a tributary to the Verdigris River, providing a picturesque setting for outdoor enthusiasts to enjoy water activities and scenic views.

Despite being privately owned, Diamond Sevens is regulated by the Oklahoma Water Resources Board, ensuring that the dam meets state standards for safety and maintenance. With a low hazard potential and a very high risk assessment rating, the dam is monitored and inspected regularly to ensure its structural integrity. In the event of an emergency, the dam has a controlled spillway and a valve outlet gate for controlled water release.

Enthusiasts of water resources and climate will appreciate the detailed information available about Diamond Sevens, from its design specifications to its risk assessment and emergency preparedness measures. As a recreational dam in a beautiful setting, Diamond Sevens offers both enjoyment and peace of mind for visitors and nearby communities.

Year Completed

2004

Dam Length

2400

Dam Height

97

River Or Stream

TRIB TO VERDIGRIS RIVER

Primary Dam Type

Earth

Surface Area

180

Hydraulic Height

84

Drainage Area

1421

Nid Storage

6750

Structural Height

94

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

97
       
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.