Upper Pecan Bayou Ws Scs Site 7 Dam Reservoir Report
Last Updated: December 5, 2025
The Upper Pecan Bayou WS SCS Site 7 Dam, located in Callahan, Texas, is a crucial water supply structure owned by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ).
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Summary
Designed by the USDA NRCS and completed in 1970, this earth dam stands at a height of 63 feet and has a storage capacity of 16,550 acre-feet, serving as a vital resource for the surrounding area.
The dam, situated on the North Prong Pecan Bayou, has a spillway width of 400 feet and is equipped with uncontrolled and valve outlets. With a moderate risk assessment rating, this dam plays a key role in managing the water resources of the region, with a drainage area of 38 square miles and a maximum discharge capacity of 43,740 cubic feet per second. While the condition assessment of the dam is currently not rated, it remains a critical infrastructure for water supply purposes in the area.
Despite its age, the Upper Pecan Bayou WS SCS Site 7 Dam continues to fulfill its primary purpose of providing water supply to the community, highlighting the importance of maintaining and monitoring such essential infrastructure for water resource management and climate resilience in the region.
Year Completed |
1970 |
Dam Length |
3850 |
Dam Height |
63 |
River Or Stream |
NORTH PRONG PECAN BAYOU |
Primary Dam Type |
Earth |
Surface Area |
449 |
Hydraulic Height |
63 |
Drainage Area |
38 |
Nid Storage |
16550 |
Structural Height |
63 |
Outlet Gates |
Uncontrolled - 2, Valve - 1 |
Hazard Potential |
Not Available |
Foundations |
Rock, Soil |
Nid Height |
63 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cedar Ck At Ih 20
|
0cfs |
Cat Claw Ck At Abilene
|
1cfs |
Deep Ck At Moran
|
0cfs |
Clear Fk Brazos Rv At Hawley
|
3cfs |
Clear Fk Brazos Rv At Nugent
|
11cfs |
Pecan Bayou Nr Cross Cut
|
436cfs |
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 7 Dam