Lock C-9 Dam is a concrete dam located in Washington County, New York, built in 1907. It carries a Low hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 115 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Lock C-9 Dam
The primary purpose of Lock C-9 Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. It impounds the Champlain Canal near Smith Basin.
The dam stands 17 feet tall and stretches 115 feet across, creates a reservoir covering 8 acres, and has a maximum storage capacity of 91 acre-feet. Completed in 1907, the structure is over a century 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 | New York |
| County | Washington |
| Nearest City | Smith Basin |
| River/Stream | Champlain Canal |
| Coordinates | 43.35222, -73.49611 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 115 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 91 acre-ft |
| Max Storage | 91 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 8 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY16072 |
| Federal ID | NY16072 |
| More Info | State Dam Safety Program |