P-11
P-11 is a concrete dam located in Polk County, Florida, built in 1965. It carries a Significant hazard potential classification.
About P-11
The primary purpose of P-11 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 (state). It impounds the Saddle Creek near Bartow.
The dam stands 10 feet tall and stretches 110 feet across, creates a reservoir covering 4,541 acres, has a maximum storage capacity of 31,787 acre-feet, and collects water from a drainage area of 131 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 11/15/2024.
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Location
| State | Florida |
| County | Polk |
| Nearest City | Bartow |
| River/Stream | Saddle Creek |
| Coordinates | 27.93789, -81.85070 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 3 ft |
| Dam Length | 110 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 44,048 acre-ft |
| Max Storage | 31,787 acre-ft |
| Normal Storage | 44,048 acre-ft |
| Surface Area | 4,541 acres |
| Drainage Area | 131 sq mi |
| Max Discharge | 1,100 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | SWFWMD |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 11/15/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | FL13003 |
| Federal ID | FL13003 |
| More Info | State Dam Safety Program |