Holimont Upper Reservoir Dam
Holimont Upper Reservoir Dam is an earth dam located in Cattaraugus County, New York, built in 2003. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Holimont Upper Reservoir Dam
Holimont Upper Reservoir Dam is a dam in Cattaraugus, New York. The dam is owned by Holimont Inc (private). It impounds the None near Ellicottville.
The dam stands 35 feet tall, creates a reservoir covering 5 acres, and has a maximum storage capacity of 129 acre-feet. Completed in 2003, the structure is relatively new.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/19/2023.
At 35 feet, this dam is taller than 82% 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 | Cattaraugus |
| Nearest City | Ellicottville |
| River/Stream | None |
| Coordinates | 42.26444, -78.69806 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 129 acre-ft |
| Max Storage | 129 acre-ft |
| Normal Storage | 85 acre-ft |
| Surface Area | 5 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | HOLIMONT INC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/19/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY16105 |
| Federal ID | NY16105 |
| More Info | State Dam Safety Program |