Great Stream Commons Lower is an earth dam located in Union County, Pennsylvania, built in 2001. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 700 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 Great Stream Commons Lower
The primary purpose of Great Stream Commons Lower 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 Union County Economic Development Corporation (private). It impounds the Tr Susquehanna River.
The dam stands 24 feet tall and stretches 700 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 78 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, the structure is relatively new.
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. The most recent inspection on record was 07/10/2019.
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Location
| State | Pennsylvania |
| County | Union |
| River/Stream | Tr Susquehanna River |
| Coordinates | 41.11667, -76.89861 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 700 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 78 acre-ft |
| Max Storage | 78 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Union County Economic Development Corporation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/10/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | PA01699 |
| Federal ID | PA01699 |
| More Info | State Dam Safety Program |