Scs-Sallisaw Creek Site-27 Reservoir Report

Last Updated: December 5, 2025

Located in Marble City, Oklahoma, the SCS-Sallisaw Creek Site-27 is a state-regulated flood risk reduction structure designed by the USDA NRCS in 1964.


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Summary

The dam, with a height of 70 feet and a length of 800 feet, serves to mitigate flooding along the Smith Hollow river or stream. With a storage capacity of 1005 acre-feet and a maximum discharge of 1920 cubic feet per second, this dam plays a crucial role in protecting the surrounding area from potential hazards.

Despite being last inspected in 1980 and not currently rated for condition assessment, the SCS-Sallisaw Creek Site-27 is categorized with a high hazard potential and very high risk assessment. It is equipped with a controlled spillway and a single valve outlet gate. As a significant flood control infrastructure in Sequoyah County, this dam represents a vital component in the water resource management and climate resilience efforts in the region. Future inspections and risk management measures will be essential to ensure the continued safety and effectiveness of this important structure.

Year Completed

1964

Dam Length

800

Dam Height

70

River Or Stream

SMITH HOLLOW

Surface Area

6

Hydraulic Height

70

Drainage Area

2.54

Nid Storage

1005

Structural Height

70

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Soil

Nid Height

70
       
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.