New Holland Reservoir

TR MILL CREEK· Lancaster, Pennsylvania· Built 1953· Earth· 40 ft tall
High Hazard Water Supply Private

Key Takeaway

New Holland Reservoir is classified as high hazard in Pennsylvania. It was completed in 1953 and is 73 years old. Its primary use is water supply. 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 40 ft (taller than 77.2% in PA)
Dam Length670 ft
Dam TypeEarth
Max Storage165 acre-ft
Normal Storage92 acre-ft
Surface Area8 acres
Drainage Area1 sq mi
Year Completed1953 (73 years old)
NID IDPA00346

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

JACOB & EVELYN KING

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of New Holland Reservoir?

New Holland Reservoir 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 New Holland Reservoir?

New Holland Reservoir is owned by JACOB & EVELYN KING (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was New Holland Reservoir built?

New Holland Reservoir was completed in 1953, making it 73 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 New Holland Reservoir?

New Holland Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is New Holland Reservoir?

New Holland Reservoir has a dam height of 40 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 New Holland Reservoir last inspected?

New Holland Reservoir 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.