Scs-Waterfall-Gilford Creek Site-06 Reservoir Report

Last Updated: December 5, 2025

SCS-Waterfall-Gilford Creek Site-06, located in McCurtain, Oklahoma, is a state-regulated earth dam with a primary purpose of flood risk reduction.


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Summary

Constructed in 1965 by USDA NRCS, this structure stands at 20 feet in height and spans 1300 feet in length. With a maximum storage capacity of 386 acre-feet, it serves to protect the surrounding area from potential flooding events.

Managed by the Oklahoma Water Resources Board (OWRB), this dam on TR-Waterfall Creek is equipped with a controlled spillway and a single valve outlet gate. Despite its low hazard potential, the risk assessment for this site indicates a very high level of risk (1), highlighting the importance of regular inspections and maintenance. The last recorded inspection dates back to January 1, 1980, with an inspection frequency of 5 years.

As a critical piece of infrastructure in flood-prone Oklahoma, the SCS-Waterfall-Gilford Creek Site-06 serves as a vital tool in managing water resources and protecting the local community from potential hazards. Its strategic location and design make it a key asset in the state's flood risk reduction efforts, ensuring the safety and security of residents in the area.

Year Completed

1965

Dam Length

1300

Dam Height

20

River Or Stream

TR-WATERFALL CREEK

Primary Dam Type

Earth

Surface Area

15

Hydraulic Height

20

Nid Storage

386

Structural Height

20

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
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.