Hil18 is an earth dam located in Hillsborough, Florida. It carries a Undetermined hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 13,675 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 Hil18
The primary purpose of Hil18 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 Unnamed Pond near Plant City.
The dam stands 12 feet tall and stretches 13,675 feet across, creates a reservoir covering 67 acres, and has a maximum storage capacity of 3,292 acre-feet.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Plant City |
| River/Stream | Unnamed Pond |
| Coordinates | 27.76857, -82.17122 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 13,675 ft |
Storage & Hydraulics
| NID Storage | 3,292 acre-ft |
| Max Storage | 3,292 acre-ft |
| Normal Storage | 897 acre-ft |
| Surface Area | 67 acres |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Undetermined |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL12033 |
| Federal ID | FL12033 |
| More Info | State Dam Safety Program |