St. John Vianney Seminary Lake Dam

GRASSY CREEK· Jefferson, Ohio· Built 1942· Earth· 17 ft tall
Low Hazard Recreation Private

Key Takeaway

St. John Vianney Seminary Lake Dam is classified as low hazard in Ohio. It was completed in 1942 and is 84 years old. Its primary use is recreation.

Physical Details

Dam Height 17 ft (taller than 18.2% in OH)
Dam Length285 ft
Dam TypeEarth
Max Storage80 acre-ft
Normal Storage27 acre-ft
Surface Area7 acres
Drainage Area4 sq mi
Max Discharge1,573 cfs
Year Completed1942 (84 years old)
NID IDOH01094

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: No
Last Inspection: June 25, 2019
State Regulated: Yes
Regulatory Agency: Department of Natural Resources

Ownership

Apostolate for Family Consecration

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of St. John Vianney Seminary Lake Dam?

St. John Vianney Seminary Lake 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 St. John Vianney Seminary Lake Dam?

St. John Vianney Seminary Lake Dam is owned by Apostolate for Family Consecration (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was St. John Vianney Seminary Lake Dam built?

St. John Vianney Seminary Lake Dam was completed in 1942, making it 84 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 St. John Vianney Seminary Lake Dam?

St. John Vianney Seminary Lake 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 St. John Vianney Seminary Lake Dam?

St. John Vianney Seminary Lake Dam has a dam height of 17 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 St. John Vianney Seminary Lake Dam last inspected?

St. John Vianney Seminary Lake Dam was last inspected on June 25, 2019. 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.