Noralyn N-5 is an earth dam located in Polk County, Florida, built in 1958. It carries a Significant hazard potential classification.
Dam profile
NID height · 49 ft49 ft tall and 6,200 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Noralyn N-5
The primary purpose of Noralyn N-5 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 Peace River near Bartow.
The dam stands 49 feet tall and stretches 6,200 feet across, creates a reservoir covering 233 acres, and has a maximum storage capacity of 11,400 acre-feet. Completed in 1958, 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.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Bartow |
| River/Stream | Peace River |
| Coordinates | 27.83000, -81.83000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 49 ft |
| Dam Height | 49 ft |
| Dam Length | 6,200 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 11,400 acre-ft |
| Max Storage | 11,400 acre-ft |
| Normal Storage | 11,400 acre-ft |
| Surface Area | 233 acres |
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 | FL00673 |
| Federal ID | FL00673 |
| More Info | State Dam Safety Program |