Knapp Brook Site No. 1 is an earth dam located in Windsor County, Vermont, built in 1958. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 400 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 Knapp Brook Site No. 1
The primary purpose of Knapp Brook Site No. 1 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by State of Vermont - Dfw (state). It impounds the Knapp Brook near Cavendish.
The dam stands 23 feet tall and stretches 400 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 292 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1958, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/26/2016. That was over 10 years ago.
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Location
| State | Vermont |
| County | Windsor |
| Nearest City | Cavendish |
| River/Stream | Knapp Brook |
| Coordinates | 43.44563, -72.56068 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 400 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 292 acre-ft |
| Max Storage | 292 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | State of Vermont - Dfw |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/26/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | VT00076 |
| Federal ID | VT00076 |
| More Info | State Dam Safety Program |