Gibsonton (w) is an earth dam located in Hillsborough, Florida, built in 1989. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 6,864 ft long, taller than 68% 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 Gibsonton (w)
The primary purpose of Gibsonton (w) is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by The Mosaic Company (private). It impounds the Archie Creek near Gibsonton.
The dam stands 30 feet tall and stretches 6,864 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 560 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1989, the structure is 37 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 09/07/2005. That was over 21 years ago.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Gibsonton |
| River/Stream | Archie Creek |
| Coordinates | 27.87540, -82.38820 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 25 ft |
| Dam Length | 6,864 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 560 acre-ft |
| Max Storage | 560 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 110 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/07/2005 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL10032 |
| Federal ID | FL10032 |
| More Info | State Dam Safety Program |