S-70 is an earth dam located in Glades County, Florida, built in 1961. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 150 ft long, taller than 65% 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-70
The primary purpose of S-70 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 C-41 (harney Pond Canal) near Little Sarasota.
The dam stands 29 feet tall and stretches 150 feet across, creates a reservoir covering 96 acres, and has a maximum storage capacity of 2,780 acre-feet. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Florida |
| County | Glades |
| Nearest City | Little Sarasota |
| River/Stream | C-41 (harney Pond Canal) |
| Coordinates | 27.11871, -81.15721 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 150 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 2,780 acre-ft |
| Max Storage | 2,780 acre-ft |
| Normal Storage | 2,312 acre-ft |
| Surface Area | 96 acres |
| Max Discharge | 5,000 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Sfwmd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL00419 |
| Federal ID | FL00419 |
| More Info | State Dam Safety Program |