Upper Pecan Bayou Ws Scs Site 18a Dam is an earth dam located in Callahan County, Texas, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 4,020 ft long, taller than 86% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Upper Pecan Bayou Ws Scs Site 18a Dam
The primary purpose of Upper Pecan Bayou Ws Scs Site 18a Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Callahan County;callahan Divide Swcd (local government). It impounds the West Prong Burnt Branch near Webbville.
The dam stands 40 feet tall and stretches 4,020 feet across, has a maximum storage capacity of 4,035 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1968, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Texas |
| County | Callahan |
| Nearest City | Webbville |
| River/Stream | West Prong Burnt Branch |
| Coordinates | 32.13944, -99.32600 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 4,020 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 4,035 acre-ft |
| Max Storage | 4,035 acre-ft |
| Normal Storage | 200 acre-ft |
| Drainage Area | 12 sq mi |
| Max Discharge | 21,640 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Callahan County;callahan Divide Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX02934 |
| Federal ID | TX02934 |
| More Info | State Dam Safety Program |