Watson Sa No 11 Phase 2 is an earth dam located in Polk County, Florida, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 45 ft45 ft tall and 6,500 ft long, taller than 90% 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 Watson Sa No 11 Phase 2
The primary purpose of Watson Sa No 11 Phase 2 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 Bowlegs Creek near Fort Meade.
The dam stands 45 feet tall and stretches 6,500 feet across, creates a reservoir covering 62 acres, and has a maximum storage capacity of 2,808 acre-feet. Completed in 1974, 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.
At 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Fort Meade |
| River/Stream | Bowlegs Creek |
| Coordinates | 27.71000, -81.75000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 6,500 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 2,808 acre-ft |
| Max Storage | 2,808 acre-ft |
| Normal Storage | 2,808 acre-ft |
| Surface Area | 62 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 | FL00250 |
| Federal ID | FL00250 |
| More Info | State Dam Safety Program |