Lake Letterkenny Dam

TR ROCKY SPRING BRANCH· Franklin, Pennsylvania· Built 1945· Stone· 16 ft tall
Unknown Recreation Federal Government

Key Takeaway

Lake Letterkenny Dam is classified as unknown in Pennsylvania. It was completed in 1945 and is 81 years old. Its primary use is recreation.

Physical Details

Dam Height 16 ft (taller than 32.5% in PA)
Dam Length201 ft
Dam TypeStone
Max Storage60 acre-ft
Normal Storage48 acre-ft
Year Completed1945 (81 years old)
NID IDPA00847

Safety Information

Unknown

Hazard potential has not been determined.

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

Emergency Action Plan: No
State Regulated: No

Ownership

U.S. DEPARTMENT OF DEFENSE

Federal Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Lake Letterkenny Dam?

Lake Letterkenny Dam is classified as Unknown. Hazard potential has not been determined. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Lake Letterkenny Dam?

Lake Letterkenny Dam is owned by U.S. DEPARTMENT OF DEFENSE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Lake Letterkenny Dam built?

Lake Letterkenny Dam was completed in 1945, making it 81 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 Lake Letterkenny Dam?

Lake Letterkenny 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 Lake Letterkenny Dam?

Lake Letterkenny Dam has a dam height of 16 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.

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.