Speedwell Forge

HAMMER CREEK· Lancaster, Pennsylvania· Built 1966· Earth· 35 ft tall
High Hazard Recreation State Government

Key Takeaway

Speedwell Forge is classified as high hazard in Pennsylvania. It was completed in 1966 and is 60 years old. Its primary use is recreation. 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 35 ft (taller than 72.1% in PA)
Dam Length950 ft
Dam TypeEarth
Max Storage2.4K acre-ft
Normal Storage970 acre-ft
Surface Area106 acres
Drainage Area24 sq mi
Year Completed1966 (60 years old)
NID IDPA00345

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: December 29, 2020
State Regulated: Yes
Regulatory Agency: Pennsylvania Department of Environmental Protection

Ownership

PA FISH & BOAT COMMISSION

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Speedwell Forge?

Speedwell Forge 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 Speedwell Forge?

Speedwell Forge is owned by PA FISH & BOAT COMMISSION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Speedwell Forge built?

Speedwell Forge was completed in 1966, making it 60 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 Speedwell Forge?

Speedwell Forge 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 Speedwell Forge?

Speedwell Forge has a dam height of 35 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 Speedwell Forge last inspected?

Speedwell Forge was last inspected on December 29, 2020. 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.