Eastman Lake Dam
Eastman Lake Dam is an earth dam located in Sullivan County, New Hampshire, built in 1972. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Eastman Lake Dam
The primary purpose of Eastman Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Eastman Community Association (private). It impounds the Eastman Brook near Grantham.
The dam stands 35 feet tall and stretches 415 feet across, creates a reservoir covering 335 acres, has a maximum storage capacity of 9,930 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1972, the structure is well into its service life at over 50 years 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. 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 07/26/2021.
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 Hampshire 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 Hampshire |
| County | Sullivan |
| Nearest City | Grantham |
| River/Stream | Eastman Brook |
| Coordinates | 43.51330, -72.11610 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 415 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 9,930 acre-ft |
| Max Storage | 9,930 acre-ft |
| Normal Storage | 2,100 acre-ft |
| Surface Area | 335 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 4,300 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | EASTMAN COMMUNITY ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/26/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00039 |
| Federal ID | NH00039 |
| More Info | State Dam Safety Program |