Upper Pecan Bayou Ws Scs Site 7 Dam is an earth dam located in Callahan County, Texas, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 63 ft63 ft tall and 3,850 ft long, taller than 95% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Upper Pecan Bayou Ws Scs Site 7 Dam
The primary purpose of Upper Pecan Bayou Ws Scs Site 7 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Callahan County;callahan Divide Swcd (local government). It impounds the North Prong Pecan Bayou near Webbville.
The dam stands 63 feet tall and stretches 3,850 feet across, creates a reservoir covering 449 acres, has a maximum storage capacity of 16,550 acre-feet, and collects water from a drainage area of 38 square miles. Completed in 1970, 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. The most recent inspection on record was 07/24/1971. That was over 55 years ago.
At 63 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Texas |
| County | Callahan |
| Nearest City | Webbville |
| River/Stream | North Prong Pecan Bayou |
| Coordinates | 32.31372, -99.46968 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 63 ft |
| Dam Height | 63 ft |
| Dam Length | 3,850 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 16,550 acre-ft |
| Max Storage | 16,550 acre-ft |
| Normal Storage | 5,748 acre-ft |
| Surface Area | 449 acres |
| Drainage Area | 38 sq mi |
| Max Discharge | 43,740 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Callahan County;callahan Divide Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/24/1971 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX02940 |
| Federal ID | TX02940 |
| More Info | State Dam Safety Program |