Amwell No. 1 Dam

Alexauken Creek-TR· Hunterdon, New Jersey· Earth· 22 ft tall
Significant Hazard Recreation Private

Key Takeaway

Amwell No. 1 Dam is classified as significant hazard in New Jersey. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 22 ft (taller than 79.5% in NJ)
Dam Length280 ft
Dam TypeEarth
Max Storage70 acre-ft
Normal Storage50 acre-ft
Surface Area3 acres
Drainage Area1 sq mi
Max Discharge156 cfs
NID IDNJ00521

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: Yes
Last Inspection: August 4, 2022
State Regulated: Yes
Regulatory Agency: NJDEP

Ownership

Henry Nelson

Private

Nearby Dams

Amwell #2 Dam

Hunterdon, NJ

Significant Hazard 19 ft

Amwell No. 3 Dam

Hunterdon, NJ

Significant Hazard 26 ft

Sullivan Pond Dam

Hunterdon, NJ

High Hazard 19 ft

Lambertville #2 Dam

Hunterdon, NJ

High Hazard 17 ft

Village Two At New Hope

Bucks, PA

Unknown 41 ft

Stony Brook W.S. Site 11 (Amwell) Dam

Hunterdon, NJ

Significant Hazard 22 ft

Solebury Farm

Bucks, PA

High Hazard 27 ft

Canes Dam

Hunterdon, NJ

Low Hazard 10 ft

Frequently Asked Questions

What is the hazard classification of Amwell No. 1 Dam?

Amwell No. 1 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 Amwell No. 1 Dam?

Amwell No. 1 Dam is owned by Henry Nelson (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Amwell No. 1 Dam?

Amwell No. 1 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 Amwell No. 1 Dam?

Amwell No. 1 Dam has a dam height of 22 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 Amwell No. 1 Dam last inspected?

Amwell No. 1 Dam was last inspected on August 4, 2022. 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.