Jacobs Pond Dam

THIRD HERRING BROOK· Plymouth, Massachusetts· Built 1730· Earth· 11 ft tall
Significant Hazard Recreation Local Government

Key Takeaway

Jacobs Pond Dam is classified as significant hazard in Massachusetts. It was completed in 1730 and is 296 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 11 ft (taller than 25.5% in MA)
Dam Length650 ft
Dam TypeEarth
Max Storage650 acre-ft
Normal Storage110 acre-ft
Surface Area55 acres
Drainage Area1 sq mi
Year Completed1730 (296 years old)
NID IDMA00365

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: July 13, 2015
State Regulated: Yes
Regulatory Agency: DEPARTMENT OF CONSERVATION AND RECREATION

Ownership

TOWN OF NORWELL, BOARD OF SELECTMEN

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Jacobs Pond Dam?

Jacobs Pond Dam 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 Jacobs Pond Dam?

Jacobs Pond Dam is owned by TOWN OF NORWELL, BOARD OF SELECTMEN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Jacobs Pond Dam built?

Jacobs Pond Dam was completed in 1730, making it 296 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 Jacobs Pond Dam?

Jacobs Pond Dam 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 Jacobs Pond Dam?

Jacobs Pond Dam has a dam height of 11 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 Jacobs Pond Dam last inspected?

Jacobs Pond Dam was last inspected on July 13, 2015. 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.