Cobblestone Reservoir Report

Last Updated: January 12, 2026

Cobblestone is a private dam located in Oklahoma City, Oklahoma, with a primary purpose of recreation.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1924 by designer Laxman Godhania, this earth dam stands at a height of 22 feet and has a length of 760 feet. It holds a storage capacity of 175 acre-feet, with a maximum storage of 175 acre-feet and a normal storage of 86 acre-feet.

The dam is regulated by the Oklahoma Water Resources Board (OWRB) and is subject to state permitting, inspection, and enforcement. With a controlled spillway and low hazard potential, Cobblestone has not been rated for condition assessment. Despite being categorized as a very high risk (1) for flooding, there have been no emergency action plans prepared or updated for the dam.

Water resource and climate enthusiasts may find Cobblestone to be an intriguing case study in dam management and risk assessment. The history and design of the dam, along with its current regulatory status and risk assessment, offer valuable insights into the challenges of balancing recreational use with public safety and environmental stewardship in water infrastructure projects.

Year Completed

1924

Dam Length

760

Dam Height

22

River Or Stream

UN TRIB WALNUT CR

Primary Dam Type

Earth

Hydraulic Height

22

Nid Storage

175

Structural Height

22

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.