S-46 is an other dam located in Palm Beach County, Florida, built in 1958. It carries a Significant hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 136 ft long, taller than 55% of U.S. dams with a recorded height. 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-46
The primary purpose of S-46 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 Sw Fork-loxahatchee River near Jupiter.
The dam stands 26 feet tall and stretches 136 feet across, creates a reservoir covering 69 acres, and has a maximum storage capacity of 1,786 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. The most recent inspection on record was 07/12/1905. That was over 121 years ago.
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Location
| State | Florida |
| County | Palm Beach |
| Nearest City | Jupiter |
| River/Stream | Sw Fork-loxahatchee River |
| Coordinates | 26.93495, -80.14112 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 136 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 1,786 acre-ft |
| Max Storage | 1,786 acre-ft |
| Normal Storage | 1,579 acre-ft |
| Surface Area | 69 acres |
| Max Discharge | 2,050 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Sfwmd |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/12/1905 |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00339 |
| Federal ID | FL00339 |
| More Info | State Dam Safety Program |