South Lake Dam Reservoir Report

Last Updated: December 13, 2025

South Lake Dam, located in Oklahoma City, Oklahoma, is a privately owned structure designed by Doyle Engineering.


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Summary

Completed in 2005, this earth dam serves primarily for water supply purposes, with a normal storage capacity of 11 acre-feet and a maximum storage of 113 acre-feet. The dam stands at a height of 15.5 feet, with a hydraulic height of 14 feet and a structural height of 15.4 feet, spanning a length of 430 feet. It is situated on Deer Creek and falls under the regulatory oversight of the Oklahoma Water Resources Board.

With a significant hazard potential and a condition assessment rated as fair during the last inspection in February 2017, South Lake Dam remains a crucial piece of infrastructure for water management in the region. The dam features a controlled spillway and an outlet gate with a single valve. In case of emergencies, the dam is subject to an inspection frequency of three years, reflecting the importance of its structural integrity and risk management measures. Despite its condition assessment, the dam's risk assessment indicates a very high level of risk, highlighting the need for continued monitoring and maintenance to ensure its reliability in the face of potential climate-related challenges.

Year Completed

2005

Dam Length

430

Dam Height

15.5

River Or Stream

DEER CREEK

Primary Dam Type

Earth

Surface Area

7.3

Hydraulic Height

14

Drainage Area

336.7

Nid Storage

113

Structural Height

15.4

Outlet Gates

Valve - 1

Hazard Potential

Significant

Foundations

Soil

Nid Height

16
       
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.
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