Mirror Lake is a masonry dam located in Washington County, Vermont, built in 1820. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 125 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 Mirror Lake
The primary purpose of Mirror Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Eric Davis (private). It impounds the Dugar Brook-tr near Calais.
The dam stands 8 feet tall and stretches 125 feet across, creates a reservoir covering 86 acres, has a maximum storage capacity of 540 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1820, the structure is one of the older dams in the region, with over a century and a half of service.
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 10/19/2015. That was over 10 years ago.
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Location
| State | Vermont |
| County | Washington |
| Nearest City | Calais |
| River/Stream | Dugar Brook-tr |
| Coordinates | 44.39137, -72.44437 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 125 ft |
| Year Completed | 1820 (206 years old) |
Storage & Hydraulics
| NID Storage | 540 acre-ft |
| Max Storage | 540 acre-ft |
| Surface Area | 86 acres |
| Drainage Area | 5 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Eric Davis |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 10/19/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | VT00082 |
| Federal ID | VT00082 |
| More Info | State Dam Safety Program |