Scs-Stillwater Creek Site-46 Reservoir Report

Last Updated: December 9, 2025

SCS-Stillwater Creek Site-46, also known as Ham S Lake, is a state-regulated water resource located in Payne County, Oklahoma.


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Summary

Designed by the USDA NRCS, this earth dam stands at a height of 57 feet and serves the primary purpose of flood risk reduction along Harrington Creek. Completed in 1965, the dam has a storage capacity of 3,522 acre-feet, with a normal storage level of 346 acre-feet and a surface area of 43 acres.

With a controlled spillway and a hazard potential rated as high, SCS-Stillwater Creek Site-46 poses a risk of inundation in case of extreme weather events. Despite being assessed as in fair condition, the dam's risk assessment is classified as very high, indicating the need for vigilant monitoring and management measures. The emergency action plan status, inundation maps, and risk management strategies for this site are currently unclear, highlighting the importance of ongoing inspections and preparedness for potential emergencies in this critical water infrastructure.

Year Completed

1965

Dam Length

1900

Dam Height

57

River Or Stream

HARRINGTON CREEK

Primary Dam Type

Earth

Surface Area

43

Hydraulic Height

57

Nid Storage

3522

Structural Height

57

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

57
       
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.