Mirror Lake Dike is an earth dam located in Norfolk County, Massachusetts. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 11 ft11 ft tall and 350 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 Mirror Lake Dike
The primary purpose of Mirror Lake Dike is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town of Norfolk (local government). It impounds the Tributary to Stony Brook near Norfolk.
The dam stands 11 feet tall and stretches 350 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 0 square miles.
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 09/23/2021.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Norfolk |
| Nearest City | Norfolk |
| River/Stream | Tributary to Stony Brook |
| Coordinates | 42.09142, -71.31978 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Length | 350 ft |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 155 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Norfolk |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 09/23/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MA03272 |
| Federal ID | MA02553S001 |
| More Info | State Dam Safety Program |