Kingford A-3 is an earth dam located in Polk County, Florida, built in 1961. It carries a Significant hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 11,200 ft long, taller than 59% 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 Kingford A-3
The primary purpose of Kingford A-3 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 Guy Branch near Mulberry.
The dam stands 27 feet tall and stretches 11,200 feet across, creates a reservoir covering 156 acres, and has a maximum storage capacity of 4,200 acre-feet. Completed in 1961, 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 | Polk |
| Nearest City | Mulberry |
| River/Stream | Guy Branch |
| Coordinates | 27.84000, -81.99000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 11,200 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 4,200 acre-ft |
| Max Storage | 4,200 acre-ft |
| Normal Storage | 3,000 acre-ft |
| Surface Area | 156 acres |
| Max Discharge | 130 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 | FL00661 |
| Federal ID | FL00661 |
| More Info | State Dam Safety Program |