Lake Bonair Dam is an earth dam located in Tolland County, Connecticut, built in 1900. It carries a Significant hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 90 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 Lake Bonair Dam
The primary purpose of Lake Bonair Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Michael J Cole (private). It impounds the Kimballs Brook near Ellington.
The dam stands 9 feet tall and stretches 90 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 60 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1900, the structure is over a century 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. The most recent inspection on record was 06/09/2010. That was over 16 years ago.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Ellington |
| River/Stream | Kimballs Brook |
| Coordinates | 41.91436, -72.43001 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 90 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Michael J Cole |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/09/2010 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00617 |
| Federal ID | CT00617 |
| More Info | State Dam Safety Program |