S-11 is an other dam located in Sumter County, Florida, built in 1965. It carries a Significant hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 64 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-11
The primary purpose of S-11 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Swfwmd (local government). It impounds the Canal C near Webster.
The dam stands 20 feet tall and stretches 64 feet across, creates a reservoir covering 93 acres, has a maximum storage capacity of 1,250 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 1965, 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. The most recent inspection on record was 11/19/2024.
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Location
| State | Florida |
| County | Sumter |
| Nearest City | Webster |
| River/Stream | Canal C |
| Coordinates | 28.58000, -82.09000 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 20 ft |
| Dam Height | 9 ft |
| Dam Length | 64 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 1,181 acre-ft |
| Surface Area | 93 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 600 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Swfwmd |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/19/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | FL77000 |
| Federal ID | FL77000 |
| More Info | State Dam Safety Program |