Sewalls South Channel Dam
Sewalls South Channel Dam is a concrete dam located in Jefferson County, New York, built in 1978. It carries a Significant hazard potential classification.
About Sewalls South Channel Dam
The primary purpose of Sewalls South Channel Dam is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Erie Boulevard Hydropower, Lp/brookfield Renewable (private). It impounds the Black River near Watertown.
The dam stands 16 feet tall and stretches 243 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 388 acre-feet, and collects water from a drainage area of 1,875 square miles. Completed in 1978, the structure is 48 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/01/1995. That was over 30 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Jefferson |
| Nearest City | Watertown |
| River/Stream | Black River |
| Coordinates | 43.97694, -75.89333 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 243 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 388 acre-ft |
| Max Storage | 388 acre-ft |
| Normal Storage | 126 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 1,875 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Erie Boulevard Hydropower, LP/Brookfield Renewable |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 08/01/1995 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00289 |
| Federal ID | NY00289 |
| More Info | State Dam Safety Program |