Joliet Junior College Lake Dam

TRIB ROCK RUN CREEK· Will, Illinois· Built 1980· Earth· 11 ft tall
Significant Hazard Recreation Local Government

Key Takeaway

Joliet Junior College Lake Dam is classified as significant hazard in Illinois. It was completed in 1980 and is 46 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 11 ft (taller than 8.1% in IL)
Dam Length345 ft
Dam TypeEarth
Max Storage59 acre-ft
Normal Storage30 acre-ft
Surface Area8 acres
Drainage Area1 sq mi
Max Discharge952 cfs
Year Completed1980 (46 years old)
NID IDIL01000

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: January 13, 2021
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

JOLIET JUNIOR COLLEGE

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Joliet Junior College Lake Dam?

Joliet Junior College 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 Joliet Junior College Lake Dam?

Joliet Junior College Lake Dam is owned by JOLIET JUNIOR COLLEGE (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Joliet Junior College Lake Dam built?

Joliet Junior College Lake Dam was completed in 1980, making it 46 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 Joliet Junior College Lake Dam?

Joliet Junior College 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 Joliet Junior College Lake Dam?

Joliet Junior College Lake Dam has a dam height of 11 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 Joliet Junior College Lake Dam last inspected?

Joliet Junior College Lake Dam was last inspected on January 13, 2021. 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.