Colby Brook Dam
Colby Brook Dam is an earth dam located in Rockingham County, New Hampshire. It carries a Low hazard potential classification and has a fair condition assessment.
About Colby Brook Dam
The primary purpose of Colby Brook Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Berkshire Dominion Holdings Llc (private). It impounds the Colby Brook near Kingston.
The dam stands 11 feet tall and stretches 260 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 9 square miles.
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 05/21/2020.
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Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | Kingston |
| River/Stream | Colby Brook |
| Coordinates | 42.88690, -71.07970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 260 ft |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 926 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | BERKSHIRE DOMINION HOLDINGS LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/21/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00740 |
| Federal ID | NH00740 |
| More Info | State Dam Safety Program |