Tyler Tree Farm Dam is an earth dam located in Grafton County, New Hampshire, built in 1969. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 285 ft long, taller than 50% 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 Tyler Tree Farm Dam
The primary purpose of Tyler Tree Farm 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 Mr J Thornhill 4th (private). It impounds the Roaring Brook near Monroe.
The dam stands 25 feet tall and stretches 285 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1969, the structure is well into its service life at over 50 years old.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/25/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Monroe |
| River/Stream | Roaring Brook |
| Coordinates | 44.29360, -72.02580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 285 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 9 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2,443 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Mr J Thornhill 4th |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/25/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00325 |
| Federal ID | NH00325 |
| More Info | State Dam Safety Program |