Swfwmd Magdalene Control Structure #3 is an earth dam located in Hillsborough, Florida. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 2 ft2 ft tall and 14 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 Swfwmd Magdalene Control Structure #3
The primary purpose of Swfwmd Magdalene Control Structure #3 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 Swfwmd (local government). It impounds the Bay Lake near Carrollwood.
The dam stands 2 feet tall and stretches 14 feet across, creates a reservoir covering 206 acres, and has a maximum storage capacity of 256 acre-feet.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 12/02/2024.
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Location
| State | Florida |
| County | Hillsborough |
| Nearest City | Carrollwood |
| River/Stream | Bay Lake |
| Coordinates | 28.07426, -82.50019 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 2 ft |
| Dam Height | 2 ft |
| Dam Length | 14 ft |
Storage & Hydraulics
| NID Storage | 256 acre-ft |
| Max Storage | 256 acre-ft |
| Normal Storage | 256 acre-ft |
| Surface Area | 206 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Swfwmd |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/02/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL12028 |
| Federal ID | FL12028 |
| More Info | State Dam Safety Program |