Boyette Sa-5 is an earth dam located in Hillsborough, Florida, built in 1966. It carries a Significant hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 6,600 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 Boyette Sa-5
The primary purpose of Boyette Sa-5 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 Hurrah Creek near Boyette.
The dam stands 15 feet tall and stretches 6,600 feet across, creates a reservoir covering 97 acres, and has a maximum storage capacity of 1,450 acre-feet. Completed in 1966, the structure is well into its service life at over 50 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.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Boyette |
| River/Stream | Hurrah Creek |
| Coordinates | 27.78000, -82.19000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 6,600 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 1,450 acre-ft |
| Max Storage | 1,450 acre-ft |
| Normal Storage | 1,450 acre-ft |
| Surface Area | 97 acres |
| Max Discharge | 220 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00569 |
| Federal ID | FL00569 |
| More Info | State Dam Safety Program |