S-60 is an earth dam located in Osceola County, Florida, built in 1966. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 97 ft long. 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 S-60
The primary purpose of S-60 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Sfwmd (local government). It impounds the Alligator Lake near St Cloud.
The dam stands 23 feet tall and stretches 97 feet across, creates a reservoir covering 18,627 acres, and has a maximum storage capacity of 73,000 acre-feet. Completed in 1966, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 11/14/2024.
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Location
| State | Florida |
| County | Osceola |
| Nearest City | St Cloud |
| River/Stream | Alligator Lake |
| Coordinates | 28.17670, -81.23416 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 97 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 73,000 acre-ft |
| Max Storage | 73,000 acre-ft |
| Normal Storage | 43,000 acre-ft |
| Surface Area | 18,627 acres |
| Max Discharge | 450 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Sfwmd |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/14/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00267 |
| Federal ID | FL00267 |
| More Info | State Dam Safety Program |