Noralyn N-11a
Noralyn N-11a is an earth dam located in Polk County, Florida, built in 1963. It carries a Significant hazard potential classification.
About Noralyn N-11a
The primary purpose of Noralyn N-11a 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 Branch near Homeland.
The dam stands 25 feet tall and stretches 5,300 feet across, creates a reservoir covering 212 acres, and has a maximum storage capacity of 5,300 acre-feet. Completed in 1963, 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 | Homeland |
| River/Stream | Camp Branch |
| Coordinates | 27.82000, -81.86000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 5,300 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 5,300 acre-ft |
| Max Storage | 5,300 acre-ft |
| Normal Storage | 5,300 acre-ft |
| Surface Area | 212 acres |
| Max Discharge | 500 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 | FL00646 |
| Federal ID | FL00646 |
| More Info | State Dam Safety Program |