Noralyn N-11b
Noralyn N-11b is an earth dam located in Polk County, Florida, built in 1964. It carries a Significant hazard potential classification.
About Noralyn N-11b
The primary purpose of Noralyn N-11b 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 Camp Creek near Bartow.
The dam stands 14 feet tall and stretches 4,500 feet across, creates a reservoir covering 121 acres, and has a maximum storage capacity of 1,700 acre-feet. Completed in 1964, 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 | Bartow |
| River/Stream | Camp Creek |
| Coordinates | 27.81000, -81.86000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 4,500 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 1,700 acre-ft |
| Max Storage | 1,700 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 121 acres |
| Max Discharge | 140 cfs |
Ownership & Safety
| Purpose | Tailings |
| Owner | THE MOSAIC COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00662 |
| Federal ID | FL00662 |
| More Info | State Dam Safety Program |