South Pierce Chem Works Secondary is an earth dam located in Polk County, Florida, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 10,600 ft long, taller than 74% 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 South Pierce Chem Works Secondary
The primary purpose of South Pierce Chem Works Secondary 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 Bradley.
The dam stands 32 feet tall and stretches 10,600 feet across, creates a reservoir covering 2,680 acres, and has a maximum storage capacity of 1,250 acre-feet. Completed in 1964, 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.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Bradley |
| River/Stream | Unnamed Pond |
| Coordinates | 27.76000, -81.93000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 10,600 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 2,680 acres |
| Max Discharge | 18 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | The Mosaic Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00218 |
| Federal ID | FL00218 |
| More Info | State Dam Safety Program |