Mystic Lake Dam

TRIBUTARY TO LITTLE MIAMI RIVER· Greene, Ohio· Built 1950· Earth· 12 ft tall
Low Hazard Recreation Private

Key Takeaway

Mystic Lake Dam is classified as low hazard in Ohio. It was completed in 1950 and is 76 years old. Its primary use is recreation.

Physical Details

Dam Height 12 ft (taller than 4.8% in OH)
Dam Length308 ft
Dam TypeEarth
Max Storage65 acre-ft
Normal Storage16 acre-ft
Surface Area7 acres
Drainage Area0 sq mi
Max Discharge176 cfs
Year Completed1950 (76 years old)
NID IDOH01658

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 20, 2019
State Regulated: Yes
Regulatory Agency: Department of Natural Resources

Ownership

Tecumseh Council No. 439

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Mystic Lake Dam?

Mystic 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 Mystic Lake Dam?

Mystic Lake Dam is owned by Tecumseh Council No. 439 (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mystic Lake Dam built?

Mystic Lake Dam was completed in 1950, making it 76 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 Mystic Lake Dam?

Mystic 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 Mystic Lake Dam?

Mystic Lake Dam has a dam height of 12 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 Mystic Lake Dam last inspected?

Mystic Lake Dam was last inspected on June 20, 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.