Muddy Run Recreation Dam

Susquehanna River· Lancaster, Pennsylvania· Built 1967· Rockfill· 90 ft tall
Low Hazard Hydroelectric Recreation Public Utility

Key Takeaway

Muddy Run Recreation Dam is classified as low hazard in Pennsylvania. It was completed in 1967 and is 59 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 90 ft (taller than 94.4% in PA)
Dam Length750 ft
Dam TypeRockfill
Max Storage3.0K acre-ft
Normal Storage2.7K acre-ft
Surface Area100 acres
Drainage Area4 sq mi
Max Discharge11,000 cfs
Year Completed1967 (59 years old)
NID IDPA01562

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

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

Emergency Action Plan: Yes
Last Inspection: August 20, 2022
State Regulated: No

Ownership

Constellation Energy Generation, LLC (NYRO)

Public Utility

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Muddy Run Recreation Dam?

Muddy Run Recreation Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Muddy Run Recreation Dam?

Muddy Run Recreation Dam is owned by Constellation Energy Generation, LLC (NYRO) (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Muddy Run Recreation Dam built?

Muddy Run Recreation Dam was completed in 1967, making it 59 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 Muddy Run Recreation Dam?

Muddy Run Recreation Dam serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Muddy Run Recreation Dam?

Muddy Run Recreation Dam has a dam height of 90 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 Muddy Run Recreation Dam last inspected?

Muddy Run Recreation Dam was last inspected on August 20, 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.