Rail Joint Mill Dam
Rail Joint Mill Dam is a concrete dam located in Rensselaer County, New York, built in 1903. It carries a Significant hazard potential classification and has a poor condition assessment.
About Rail Joint Mill Dam
The primary purpose of Rail Joint Mill Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by City Of Troy (local government). It impounds the Wynantskill near Troy.
The dam stands 25 feet tall and stretches 165 feet across, creates a reservoir covering 1 acres, and has a maximum storage capacity of 10 acre-feet. Completed in 1903, the structure is over a century 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 01/04/2023.
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Location
| State | New York |
| County | Rensselaer |
| Nearest City | Troy |
| River/Stream | Wynantskill |
| Coordinates | 42.70389, -73.69250 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 165 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 10 acre-ft |
| Max Storage | 10 acre-ft |
| Normal Storage | 6 acre-ft |
| Surface Area | 1 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CITY OF TROY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 01/04/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NY13738 |
| Federal ID | NY13738 |
| More Info | State Dam Safety Program |