Osborne Lagoon is an earth dam located in Chester County, Pennsylvania, built in 2012. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 50 ft50 ft tall and 2,218 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Osborne Lagoon
Osborne Lagoon is a dam in Chester, Pennsylvania. The dam is owned by Oxford Area Sewer Authority (local government). It impounds the Wtrshd Leech Run.
The dam stands 50 feet tall and stretches 2,218 feet across, has a maximum storage capacity of 118 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2012, the structure is relatively new.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 12/03/2014. That was over 11 years ago.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Pennsylvania |
| County | Chester |
| River/Stream | Wtrshd Leech Run |
| Coordinates | 39.80444, -75.99167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 2,218 ft |
| Year Completed | 2012 (14 years old) |
Storage & Hydraulics
| NID Storage | 118 acre-ft |
| Max Storage | 118 acre-ft |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Oxford Area Sewer Authority |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/03/2014 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA01904 |
| Federal ID | PA01904 |
| More Info | State Dam Safety Program |