Stanley Draper Reservoir Report

Last Updated: December 12, 2025

Stanley Draper, located in Moore, Oklahoma, is a vital earth dam that serves as a key water supply source for the region.


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Summary

Built in 1962 by C.E. Bretz Inc., this dam stands at a height of 111 feet and has a storage capacity of 148,000 acre-feet. With a surface area of 2900 acres and a drainage area of 13.07 square miles, Stanley Draper plays a crucial role in managing water resources in the area.

The dam, situated on East Elm Creek, is regulated by the Oklahoma Water Resources Board and is designated for water supply purposes. It features a controlled spillway with a width of 10 feet and a valve outlet gate. Despite its high hazard potential, Stanley Draper has been assessed as satisfactory in condition, undergoing regular inspections to ensure its safety and functionality. The risk assessment for the dam is classified as very high, emphasizing the importance of proper risk management measures in place.

In case of emergencies, Stanley Draper's Emergency Action Plan (EAP) is periodically updated and meets regulatory guidelines. The dam's risk management measures and inundation maps are crucial components in ensuring the safety and security of the surrounding areas. As a significant infrastructure for water supply and resource management in Cleveland County, Stanley Draper continues to play a vital role in supporting the community's water needs while adhering to strict regulatory standards and safety protocols.

Year Completed

1962

Dam Length

7250

Dam Height

111

River Or Stream

EAST ELM CREEK

Primary Dam Type

Earth

Surface Area

2900

Hydraulic Height

111

Drainage Area

13.07

Nid Storage

148000

Structural Height

111

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Rock

Nid Height

111
       
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.