East Pre-Sedimentation Basin Reservoir Report

Last Updated: December 5, 2025

Located in Wagoner, Oklahoma, the East Pre-Sedimentation Basin is a vital water resource infrastructure designed by HDR Engineering Inc.


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Summary

Completed in 2012, this earth-type dam stands at a height of 28 feet and spans 3600 feet in length. With a storage capacity of 342 acre-feet and a surface area of 20.53 acres, it serves the primary purpose of water supply for the city of Broken Arrow.

This pre-sedimentation basin plays a crucial role in managing water resources from the Verdigris River-Old Channel, ensuring a steady supply of clean water for the local community. The dam's spillway type is classified as uncontrolled, with a spillway width of 5 feet. Despite its high hazard potential, the East Pre-Sedimentation Basin is in satisfactory condition, as assessed in November 2021, with a moderate risk rating.

Operated by the local government and regulated by the Oklahoma Water Resources Board, this structure undergoes regular inspections to maintain its integrity and safety standards. With its strategic location and effective design, the East Pre-Sedimentation Basin exemplifies the importance of sustainable water management practices in mitigating the impacts of climate change on water resources.

Year Completed

2012

Dam Length

3600

Dam Height

28

River Or Stream

VERDIGRIS RIVER-OLD CHANNEL

Primary Dam Type

Earth

Surface Area

20.53

Hydraulic Height

21

Drainage Area

20.53

Nid Storage

342

Structural Height

28

Hazard Potential

High

Nid Height

28
       
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.