32acre Cooling Pond is an earth dam located in Hillsborough, Florida, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 11,600 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 32acre Cooling Pond
The primary purpose of 32acre Cooling 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 Alafia River near Gibsonton.
The dam stands 15 feet tall and stretches 11,600 feet across, creates a reservoir covering 29 acres, has a maximum storage capacity of 400 acre-feet, and collects water from a drainage area of 32 square miles. 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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/07/1999. That was over 27 years ago.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Gibsonton |
| River/Stream | Alafia River |
| Coordinates | 27.80316, -82.45546 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 11 ft |
| Dam Length | 11,600 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 400 acre-ft |
| Max Storage | 400 acre-ft |
| Normal Storage | 350 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 32 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/07/1999 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | FL10111 |
| Federal ID | FL10111 |
| More Info | State Dam Safety Program |