Thompson Lake Dam

TRIBUTARY TO BLACK FORK MOHICAN RIVER - OFFSTREAM· Ashland, Ohio· Built 1972· Earth· 16 ft tall
Significant Hazard Recreation Private

Key Takeaway

Thompson Lake Dam is classified as significant hazard in Ohio. It was completed in 1972 and is 54 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 16 ft (taller than 15.8% in OH)
Dam Length545 ft
Dam TypeEarth
Max Storage33 acre-ft
Normal Storage26 acre-ft
Surface Area5 acres
Drainage Area0 sq mi
Max Discharge9 cfs
Year Completed1972 (54 years old)
NID IDOH01170

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: December 5, 2019
State Regulated: Yes
Regulatory Agency: Department of Natural Resources

Ownership

Mohican Campground, LLC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Thompson Lake Dam?

Thompson Lake Dam 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 Thompson Lake Dam?

Thompson Lake Dam is owned by Mohican Campground, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Thompson Lake Dam built?

Thompson Lake Dam was completed in 1972, making it 54 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 Thompson Lake Dam?

Thompson 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 Thompson Lake Dam?

Thompson Lake Dam has a dam height of 16 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 Thompson Lake Dam last inspected?

Thompson Lake Dam was last inspected on December 5, 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.