Armstrong Pond Dam

MONATIQUOT RIVER· Norfolk, Massachusetts· Concrete· 20 ft tall

High Hazard Other Private

Key Takeaway

Armstrong Pond Dam is classified as high hazard in Massachusetts. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height	20 ft (taller than 69.5% in MA)
Dam Length	86 ft
Dam Type	Concrete
Max Storage	48 acre-ft
Normal Storage	17 acre-ft

Surface Area	4 acres
Drainage Area	26 sq mi
NID ID	MA03102

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

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

Emergency Action Plan: Yes

Last Inspection: June 15, 2017

State Regulated: Yes

Regulatory Agency: DEPARTMENT OF CONSERVATION AND RECREATION

Ownership

HOLLINGSWORTH POND, LLC

Private

Nearby Dams

Braintree Dam

Norfolk, MA

High Hazard 37 ft

Smelt Brook Dam

Norfolk, MA

High Hazard 15 ft

Great Pond Upper Reservoir Dam

Norfolk, MA

High Hazard 18 ft

Great Pond Dam

Norfolk, MA

High Hazard 10 ft

Weymouth Great Pond Dam

Norfolk, MA

Significant Hazard 9 ft

Lake Holbrook Dam

Norfolk, MA

Significant Hazard 10 ft

Blue Hills Reservoir Dam

Norfolk, MA

High Hazard 36 ft

Cushing Pond Dam

Plymouth, MA

Significant Hazard 12 ft

Frequently Asked Questions

What is the hazard classification of Armstrong Pond Dam?

Armstrong Pond Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Armstrong Pond Dam?

Armstrong Pond Dam is owned by HOLLINGSWORTH POND, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Armstrong Pond Dam?

Armstrong Pond Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Armstrong Pond Dam?

Armstrong Pond Dam has a dam height of 20 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 Armstrong Pond Dam last inspected?

Armstrong Pond Dam was last inspected on June 15, 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.