Marcy Reservoir #11 Dam is an earth dam located in Oneida County, New York, built in 1915. It carries a High hazard potential classification.
Dam profile
NID height · 44 ft44 ft tall and 1,040 ft long, taller than 89% of U.S. dams with a recorded height. 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 Marcy Reservoir #11 Dam
The primary purpose of Marcy Reservoir #11 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Mohawk Valley Water Authority (local government). It impounds the Tr-decks Creek near Marcy.
The dam stands 44 feet tall and stretches 1,040 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 64 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1915, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 08/19/2020.
At 44 feet, this dam is taller than 89% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New York dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Oneida |
| Nearest City | Marcy |
| River/Stream | Tr-decks Creek |
| Coordinates | 43.16444, -75.25278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 1,040 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 64 acre-ft |
| Max Storage | 64 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Mohawk Valley Water Authority |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Last Inspection | 08/19/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00193 |
| Federal ID | NY00193 |
| More Info | State Dam Safety Program |