Sahoma Lake Reservoir Report

Last Updated: December 6, 2025

Sahoma Lake in Sapulpa, Oklahoma is a vital water resource owned and regulated by the local government.


°F

°F

mph

Wind

%

Humidity

Summary

The dam, completed in 1947, serves primarily for water supply purposes with a maximum storage capacity of 5,270 acre-feet and a normal storage of 4,850 acre-feet. Situated on Rock Creek, the lake covers an area of 344 acres and has a drainage area of 37.3 square miles.

The earth dam stands at a height of 45 feet and has a controlled spillway with a width of 4 feet. Despite its high hazard potential and poor condition assessment, the lake provides essential water storage and discharge capabilities for the region. The dam is inspected annually to ensure its structural integrity and meet regulatory requirements set by the Oklahoma Water Resources Board.

Climate and water enthusiasts visiting Sahoma Lake can appreciate its historical significance and engineering marvels, as well as the ecological importance it serves in the local environment. With its strategic location and critical role in water management, Sahoma Lake stands as a testament to the enduring impact of water resource infrastructure on communities and ecosystems in Creek County, Oklahoma.

Year Completed

1947

Dam Length

1320

Dam Height

45

River Or Stream

ROCK CREEK

Primary Dam Type

Earth

Surface Area

344

Hydraulic Height

45

Drainage Area

37.3

Nid Storage

5270

Structural Height

45

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Rock

Nid Height

45
       
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.