Sixmile Creek Wid Site 11 Reservoir Report

Last Updated: December 5, 2025

Sixmile Creek Wid Site 11, also known as Sixmile Creek Watershed Site 11 Dam, is a vital flood risk reduction infrastructure located in Caulksville, Arkansas.


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Summary

Built in 1954 by the USDA NRCS, this earth dam stands at a structural height of 36 feet with a hydraulic height of 14 feet. With a capacity to store 565 acre-feet of water and covering a surface area of 7.5 acres, it plays a crucial role in managing floodwaters in the Rattlesnake Creek-TR watershed.

This dam, managed by the local government, has a significant hazard potential and a moderate risk assessment rating. While not currently regulated or inspected by state agencies, it serves as a key component in the flood risk reduction strategy for the area. With no outlet gates and an uncontrolled spillway, it is designed to handle a maximum discharge of 18,706 cubic feet per second, safeguarding the surrounding community from potential flooding events. Despite its age, the condition of the dam is not rated, highlighting the need for ongoing monitoring and maintenance to ensure its continued functionality in the face of changing climate conditions.

Sixmile Creek Wid Site 11 is a testament to the importance of water resource management and climate resilience in safeguarding communities from the impacts of extreme weather events. As a critical piece of infrastructure in the Little Rock District, this dam serves as a vital tool in protecting the residents of Logan County, Arkansas, from the potential devastation of flooding. With its historical significance dating back to the mid-20th century, it stands as a reminder of the ongoing need for investment in maintaining and upgrading our water infrastructure to adapt to the challenges of a changing climate.

Year Completed

1954

Dam Length

763

River Or Stream

RATTLESNAKE CREEK-TR

Primary Dam Type

Earth

Surface Area

7.5

Hydraulic Height

14

Drainage Area

1.81

Nid Storage

565

Structural Height

36

Outlet Gates

Uncontrolled

Hazard Potential

Significant

Nid Height

36
       
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.