Marissa Recreation Association South Lake Dam

TRIB MUD CREEK· St. Clair, Illinois· Built 1954· Earth· 32 ft tall
Significant Hazard Recreation Private

Key Takeaway

Marissa Recreation Association South Lake Dam is classified as significant hazard in Illinois. It was completed in 1954 and is 72 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 32 ft (taller than 69.5% in IL)
Dam Length540 ft
Dam TypeEarth
Max Storage313 acre-ft
Normal Storage187 acre-ft
Surface Area21 acres
Drainage Area0 sq mi
Max Discharge230 cfs
Year Completed1954 (72 years old)
NID IDIL00377

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: No
Last Inspection: June 8, 2020
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

MARISSA RECREATIONAL AREA ASSOCIATION

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Marissa Recreation Association South Lake Dam?

Marissa Recreation Association South 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 Marissa Recreation Association South Lake Dam?

Marissa Recreation Association South Lake Dam is owned by MARISSA RECREATIONAL AREA ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Marissa Recreation Association South Lake Dam built?

Marissa Recreation Association South Lake Dam was completed in 1954, making it 72 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 Marissa Recreation Association South Lake Dam?

Marissa Recreation Association South 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 Marissa Recreation Association South Lake Dam?

Marissa Recreation Association South Lake Dam has a dam height of 32 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 Marissa Recreation Association South Lake Dam last inspected?

Marissa Recreation Association South Lake Dam was last inspected on June 8, 2020. 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.