Mill
Key Takeaway
Mill is classified as high hazard in Pennsylvania. It was completed in 1863 and is 163 years old. Its primary use is grade stabilization. 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 | 18 ft (taller than 37.7% in PA) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 589 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 73 sq mi |
| Year Completed | 1863 (163 years old) |
| NID ID | PA01028 |
Safety Information
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?
Ownership
P.H. GLATFELTER COMPANY
Private
Nearby Dams
Kessler
York, PA
Low Hazard 11 ftLake Pahagaco
York, PA
High Hazard 85 ftLake Marburg
York, PA
High Hazard 107 ftGlatco Lake
York, PA
High Hazard 20 ftEisenhart Mill
York, PA
Low Hazard 8 ftYork Indian Rock Dam
York, PA
High Hazard 83 ftLake Williams
York, PA
High Hazard 58 ftLake Redman
York, PA
High Hazard 52 ftFrequently Asked Questions
What is the hazard classification of Mill?
Mill 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 Mill?
Mill is owned by P.H. GLATFELTER COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill built?
Mill was completed in 1863, making it 163 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 Mill?
Mill serves the following purposes: Grade Stabilization, Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mill?
Mill has a dam height of 18 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 Mill last inspected?
Mill was last inspected on December 30, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.