Eastman Treatment Lagoons Dam is a dam located in Sullivan County, New Hampshire. It carries a Significant hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 280 ft long. 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 Eastman Treatment Lagoons Dam
The primary purpose of Eastman Treatment Lagoons Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Eastman Community Association (private).
The dam stands 18 feet tall and stretches 280 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 22 acre-feet.
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. The most recent inspection on record was 04/01/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Hampshire |
| County | Sullivan |
| Nearest City | Grantham |
| Coordinates | 43.50809, -72.11039 |
Physical Characteristics
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 280 ft |
Storage & Hydraulics
| NID Storage | 22 acre-ft |
| Max Storage | 22 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Eastman Community Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 04/01/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH03845 |
| Federal ID | NH03845 |
| More Info | State Dam Safety Program |