Cascade Brook Dam is a concrete dam located in Merrimack County, New Hampshire, built in 1955. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 11 ft11 ft tall and 130 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Cascade Brook Dam
The primary purpose of Cascade Brook Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Fish and Game Department (state). It impounds the Cascade Brook near Sutton.
The dam stands 11 feet tall and stretches 130 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 394 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1955, the structure is well into its service life at over 50 years old.
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 03/31/2020.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Sutton |
| River/Stream | Cascade Brook |
| Coordinates | 43.38690, -71.91970 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 130 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 394 acre-ft |
| Max Storage | 394 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 8 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Fish and Game Department |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 03/31/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00082 |
| Federal ID | NH00082 |
| More Info | State Dam Safety Program |