May Lake Dam

TR-MORMON FORK· Cass, Missouri· Built 1976· Earth· 20 ft tall

Key Takeaway

May Lake Dam is classified as high hazard in Missouri. It was completed in 1976 and is 50 years old. Its primary use is irrigation. 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 20 ft (taller than 7.1% in MO)
Dam TypeEarth
Max Storage193 acre-ft
Normal Storage84 acre-ft
Surface Area18 acres
Drainage Area270 sq mi
Year Completed1976 (50 years old)
NID IDMO20381

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: No
State Regulated: No

Ownership

RONALD MAY

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of May Lake Dam?

May Lake Dam 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 May Lake Dam?

May Lake Dam is owned by RONALD MAY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was May Lake Dam built?

May Lake Dam was completed in 1976, making it 50 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 May Lake Dam?

May Lake Dam serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is May Lake Dam?

May Lake Dam has a dam height of 20 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.

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.