Attoyac Bayou Ws Scs Site 9 Dam Reservoir Report

Last Updated: December 5, 2025

Attoyac Bayou WS SCS Site 9 Dam, located in Shelby, Texas, stands as a key structure for flood risk reduction along Hardage Creek.


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Summary

Built in 1981 by the USDA NRCS, this earth dam stretches 1450 feet in length and reaches a height of 31 feet, providing storage for up to 1345 acre-feet of water. Despite its age, the dam is in fair condition and is regularly inspected by the Texas Commission on Environmental Quality to ensure its safety and efficacy.

With a primary purpose of flood risk reduction, the Attoyac Bayou WS SCS Site 9 Dam also serves additional functions such as fire protection and stock or small fish pond management. The dam's design includes a buttress core type and a slide (sluice gate) outlet gate, reflecting its engineering to manage water flow effectively. While it currently lacks a spillway, its strategic positioning and sturdy construction contribute to its overall effectiveness in flood control and water resource management in the area.

Although the dam's hazard potential is not available, its risk assessment is classified as high, prompting ongoing monitoring and risk management measures. Despite these challenges, the Attoyac Bayou WS SCS Site 9 Dam remains a critical structure for maintaining water resources and climate resilience in the region, highlighting the importance of proactive infrastructure management in safeguarding communities against natural disasters.

Year Completed

1981

Dam Length

1450

Dam Height

31

River Or Stream

HARDAGE CREEK

Primary Dam Type

Earth

Surface Area

15

Hydraulic Height

31

Drainage Area

2.2

Nid Storage

1345

Structural Height

31

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

31
       
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.