Upper Pecan Bayou Ws Scs Site 1 Dam Reservoir Report
Last Updated: December 5, 2025
The Upper Pecan Bayou WS SCS Site 1 Dam, located in Callahan, Texas, is a key structure designed by the USDA NRCS for flood risk reduction along the TR-South Prong Pecan Bayou.
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Summary
Completed in 1967, this earth dam stands at a height of 50 feet and spans a length of 1815 feet, with a storage capacity of 3182 acre-feet. Despite its age, the dam is regularly inspected and maintained by the Texas regulatory agency, TCEQ, with the last inspection conducted in June 2010.
With a spillway width of 201 feet and a maximum discharge capacity of 10,821 cubic feet per second, the dam is equipped with slide and uncontrolled outlet gates to manage water flow during flood events. While the hazard potential and condition assessment of the dam are not available, a moderate risk rating of 3 indicates the need for ongoing risk management measures. The emergency action plan for the dam was last revised in January 2014, highlighting the importance of preparedness and coordination in the event of a potential breach or flood emergency. Overall, the Upper Pecan Bayou WS SCS Site 1 Dam serves as a critical infrastructure piece in protecting the local community from flood risks and ensuring water resource management in the region.
Year Completed |
1967 |
Dam Length |
1815 |
Dam Height |
50 |
River Or Stream |
TR-SOUTH PRONG PECAN BAYOU |
Primary Dam Type |
Earth |
Hydraulic Height |
50 |
Nid Storage |
3182 |
Structural Height |
50 |
Outlet Gates |
Slide (sluice gate) - 1, Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
50 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cat Claw Ck At Abilene
|
1cfs |
Cedar Ck At Ih 20
|
0cfs |
Hords Ck Nr Coleman
|
0cfs |
Jim Ned Ck At Cr 140 Nr Coleman
|
0cfs |
Pecan Bayou Nr Cross Cut
|
436cfs |
Clear Fk Brazos Rv At Hawley
|
3cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Upper Pecan Bayou Ws Scs Site 1 Dam