Pratt Pond Spillway Section is an earth dam located in Hillsborough, New Hampshire, built in 1935. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 6 ft6 ft tall and 140 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 Pratt Pond Spillway Section
The primary purpose of Pratt Pond Spillway Section is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Des Water Division (state). It impounds the Tr Mitchell Brook near Mason.
The dam stands 6 feet tall and stretches 140 feet across, creates a reservoir covering 26 acres, has a maximum storage capacity of 183 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1935, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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. The most recent inspection on record was 05/05/2021.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Mason |
| River/Stream | Tr Mitchell Brook |
| Coordinates | 42.78625, -71.76185 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 6 ft |
| Dam Height | 6 ft |
| Dam Length | 140 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 183 acre-ft |
| Max Storage | 183 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 741 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Des Water Division |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/05/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00413 |
| Federal ID | NH00413 |
| More Info | State Dam Safety Program |