Big Tank Dam Nunley is an earth dam located in Webb County, Texas, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 2,300 ft long. 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 Big Tank Dam Nunley
Big Tank Dam Nunley is a dam in Webb, Texas. The dam is owned by Robert Nunley Jr (private). It impounds the Tr-los Olmos Creek.
The dam stands 21 feet tall and stretches 2,300 feet across, creates a reservoir covering 102 acres, and has a maximum storage capacity of 672 acre-feet. Completed in 1960, 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.
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Location
| State | Texas |
| County | Webb |
| River/Stream | Tr-los Olmos Creek |
| Coordinates | 27.99481, -99.09417 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 2,300 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 672 acre-ft |
| Max Storage | 672 acre-ft |
| Normal Storage | 362 acre-ft |
| Surface Area | 102 acres |
| Spillway Type | None |
Ownership & Safety
| Owner | Robert Nunley Jr |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX02275 |
| Federal ID | TX02275 |
| More Info | State Dam Safety Program |