Knowles Pond Dam
Knowles Pond Dam is an earth dam located in Merrimack County, New Hampshire, built in 1935. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Knowles Pond Dam
The primary purpose of Knowles Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Northfield (local government). It impounds the Tr Williams Brook near Northfield.
The dam stands 11 feet tall and stretches 350 feet across, creates a reservoir covering 56 acres, has a maximum storage capacity of 237 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/05/2019.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Northfield |
| River/Stream | Tr Williams Brook |
| Coordinates | 43.42910, -71.54470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 350 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 237 acre-ft |
| Max Storage | 237 acre-ft |
| Normal Storage | 182 acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF NORTHFIELD |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/05/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00367 |
| Federal ID | NH00367 |
| More Info | State Dam Safety Program |