Upper Pecan Bayou Ws Scs Site 30 Dam Reservoir Report

Last Updated: December 5, 2025

The Upper Pecan Bayou WS SCS Site 30 Dam is a crucial structure located in Williams, Texas, designed by the USDA NRCS to serve as a flood risk reduction measure along the Lost Creek.


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Summary

Completed in 1975, this earth dam stands at a height of 34 feet and has a length of 3725 feet, providing a storage capacity of 2072 acre-feet. With a drainage area of 5.39 square miles, the dam plays a key role in protecting the surrounding area from potential flooding events.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam is inspected every 5 years to ensure its structural integrity. Despite having an unsatisfactory condition assessment as of April 2021, the dam's hazard potential is currently not available, and it poses a moderate risk according to a risk assessment conducted on the site. With its primary purpose being flood risk reduction, the Upper Pecan Bayou WS SCS Site 30 Dam serves as a critical infrastructure for the community, highlighting the collaborative efforts between government agencies and conservation services in safeguarding water resources and mitigating the impact of climate-related events in the region.

Year Completed

1975

Dam Length

3725

Dam Height

34

River Or Stream

LOST CREEK

Primary Dam Type

Earth

Surface Area

36

Hydraulic Height

34

Drainage Area

5.39

Nid Storage

2072

Structural Height

34

Outlet Gates

Uncontrolled - 2, Valve - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

34
       
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.