Thompson Island Dam
Thompson Island Dam is a concrete dam located in Saratoga County, New York, built in 1910. It carries a Low hazard potential classification.
About Thompson Island Dam
The primary purpose of Thompson Island Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by New York State Canal Corporation (state). It impounds the Hudson River near Ft Miller.
The dam stands 15 feet tall and stretches 736 feet across, creates a reservoir covering 36 acres, has a maximum storage capacity of 1,000 acre-feet, and collects water from a drainage area of 3,440 square miles. Completed in 1910, 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. The most recent inspection on record was 08/27/1971. That was over 54 years ago.
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Location
| State | New York |
| County | Saratoga |
| Nearest City | Ft Miller |
| River/Stream | Hudson River |
| Coordinates | 43.18833, -73.58333 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 736 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,000 acre-ft |
| Max Storage | 1,000 acre-ft |
| Normal Storage | 1,000 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 3,440 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Navigation |
| Owner | New York State Canal Corporation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 08/27/1971 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01074 |
| Federal ID | NY01074 |
| More Info | State Dam Safety Program |