Upper Pecan Bayou Ws Scs Site 20 Dam Reservoir Report

Last Updated: December 5, 2025

The Upper Pecan Bayou WS SCS Site 20 Dam, located in Coleman County, Texas, is a crucial structure designed by the USDA NRCS to reduce flood risks along the Buffalo Branch.


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Summary

Completed in 1967, this earth dam stands at a height of 35 feet and spans a length of 688 feet, with a storage capacity of 535 acre-feet. Despite its primary purpose being flood risk reduction, the dam also serves fire protection, stock, and small fish pond purposes.

Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the Upper Pecan Bayou Dam plays a vital role in the region's water resource management. With a moderate risk assessment rating, the dam has four uncontrolled outlet gates and a spillway width of 179 feet. Although its hazard potential and condition assessment are currently not available, the dam has been inspected periodically, with the last inspection conducted in August 2010.

As a part of the Fort Worth District under the US Army Corps of Engineers, the Upper Pecan Bayou WS SCS Site 20 Dam contributes to the overall water infrastructure in the area. With a drainage area of 2.94 square miles and a maximum discharge capacity of 4070 cubic feet per second, this dam plays a critical role in mitigating flooding and ensuring the safety and sustainability of the surrounding communities.

Year Completed

1967

Dam Length

688

Dam Height

35

River Or Stream

BUFFALO BRANCH

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

35

Drainage Area

2.94

Nid Storage

535

Structural Height

35

Outlet Gates

Uncontrolled - 4

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

35
       
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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.