Long Pond Dam
Long Pond Dam is an earth dam located in Grafton County, New Hampshire, built in 1933. It carries a Significant hazard potential classification.
About Long Pond Dam
The primary purpose of Long Pond Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the Whitcher Brook near Benton.
The dam stands 12 feet tall and stretches 415 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1933, the structure is well-established, with more than 75 years of service.
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 07/18/2018.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Benton |
| River/Stream | Whitcher Brook |
| Coordinates | 44.05921, -71.89042 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 415 ft |
| Year Completed | 1933 (93 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,650 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USDA FS |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 07/18/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00266 |
| Federal ID | NH00266 |
| More Info | State Dam Safety Program |