Lonesome Plant Drainage Pond
Lonesome Plant Drainage Pond is an earth dam located in Hillsborough, Florida, built in 1976. It carries a Low hazard potential classification.
About Lonesome Plant Drainage Pond
The primary purpose of Lonesome Plant Drainage Pond 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 South Prong Alafia River near Picnic.
The dam stands 23 feet tall and stretches 8,800 feet across, creates a reservoir covering 30 acres, and has a maximum storage capacity of 700 acre-feet. Completed in 1976, the structure is 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 | Florida |
| County | Hillsborough |
| Nearest City | Picnic |
| River/Stream | South Prong Alafia River |
| Coordinates | 27.74000, -82.12000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 8,800 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 700 acre-ft |
| Max Storage | 700 acre-ft |
| Normal Storage | 490 acre-ft |
| Surface Area | 30 acres |
| Max Discharge | 115 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | THE MOSAIC COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00612 |
| Federal ID | FL00612 |
| More Info | State Dam Safety Program |