Hilloch

TR HARVEY RUN· Delaware, Pennsylvania· Built 1951· Earth· 20 ft tall
Significant Hazard Recreation Private

Key Takeaway

Hilloch is classified as significant hazard in Pennsylvania. It was completed in 1951 and is 75 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 20 ft (taller than 43.1% in PA)
Dam Length345 ft
Dam TypeEarth
Max Storage55 acre-ft
Normal Storage39 acre-ft
Surface Area6 acres
Drainage Area1 sq mi
Year Completed1951 (75 years old)
NID IDPA00933

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: September 11, 2018
State Regulated: Yes
Regulatory Agency: Pennsylvania Department of Environmental Protection

Ownership

HILLOCH HOMEOWNERS ASSOCIATION

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Hilloch?

Hilloch 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 Hilloch?

Hilloch is owned by HILLOCH HOMEOWNERS ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Hilloch built?

Hilloch was completed in 1951, making it 75 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 Hilloch?

Hilloch 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 Hilloch?

Hilloch 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 Hilloch last inspected?

Hilloch was last inspected on September 11, 2018. 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.