Fernwood Lake South Dike

ANNISQUAM RIVER· Essex, Massachusetts· Built 1877· Earth· 8 ft tall
Significant Hazard Recreation Local Government

Key Takeaway

Fernwood Lake South Dike is classified as significant hazard in Massachusetts. It was completed in 1877 and is 149 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 8 ft (taller than 6.7% in MA)
Dam Length325 ft
Dam TypeEarth
Max Storage317 acre-ft
Normal Storage225 acre-ft
Surface Area28 acres
Drainage Area1 sq mi
Year Completed1877 (149 years old)
NID IDMA02269

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: March 22, 2017
State Regulated: Yes
Regulatory Agency: DEPARTMENT OF CONSERVATION AND RECREATION

Ownership

CITY OF GLOUCESTER, DEPARTMENT OF PUBLIC WORKS

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Fernwood Lake South Dike?

Fernwood Lake South Dike is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Fernwood Lake South Dike?

Fernwood Lake South Dike is owned by CITY OF GLOUCESTER, DEPARTMENT OF PUBLIC WORKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Fernwood Lake South Dike built?

Fernwood Lake South Dike was completed in 1877, making it 149 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Fernwood Lake South Dike?

Fernwood Lake South Dike serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Fernwood Lake South Dike?

Fernwood Lake South Dike has a dam height of 8 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Fernwood Lake South Dike last inspected?

Fernwood Lake South Dike was last inspected on March 22, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.