Lynn Reservoir Dam
Lynn Reservoir Dam is an earth dam located in Essex County, Massachusetts, built in 1872. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lynn Reservoir Dam
The primary purpose of Lynn Reservoir Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Lynn Water And Sewer Commission (local government). It impounds the Off-channel Reservoir near Lynn.
The dam stands 10 feet tall and stretches 1,920 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 57 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1872, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 12/17/2021.
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Location
| State | Massachusetts |
| County | Essex |
| Nearest City | Lynn |
| River/Stream | Off-channel Reservoir |
| Coordinates | 42.47490, -70.97291 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Length | 1,920 ft |
| Year Completed | 1872 (154 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 52 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 4 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Lynn Water and Sewer Commission |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/17/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA01285 |
| Federal ID | MA01285 |
| More Info | State Dam Safety Program |