Attoyac Bayou Ws Scs Site 7 Dam Reservoir Report

Last Updated: December 5, 2025

Attoyac Bayou WS SCS Site 7 Dam, located in Shelby County, Texas, was constructed in 1974 by the USDA NRCS for flood risk reduction along the Big Branch river.


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Summary

This Earth-type dam stands at a height of 27 feet and spans a length of 1012 feet, with a storage capacity of 735 acre-feet and a surface area of 33.3 acres. Despite its age, the dam remains in satisfactory condition and has not been rated for hazard potential.

The primary purpose of Attoyac Bayou WS SCS Site 7 Dam is flood risk reduction, although it also serves purposes such as fire protection and stock or small fish pond management. The dam is owned by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), with state permitting, inspection, and enforcement in place. Although it lacks a spillway, the dam is equipped with a slide gate for outlet control. The risk assessment for this dam is considered high, indicating a need for ongoing monitoring and risk management measures. For water resource and climate enthusiasts, this dam represents a crucial infrastructure for managing flood risks in the region.

Year Completed

1974

Dam Length

1012

Dam Height

27

River Or Stream

BIG BRANCH

Primary Dam Type

Earth

Surface Area

33.3

Hydraulic Height

27

Drainage Area

1.3

Nid Storage

735

Structural Height

27

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

27
       
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.