Osage Lake Dam

TRIB WEST FORK WOOD R· Macoupin, Illinois· Earth· 38 ft tall
Significant Hazard Flood Risk Reduction Private

Key Takeaway

Osage Lake Dam is classified as significant hazard in Illinois. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 38 ft (taller than 80.7% in IL)
Dam Length220 ft
Dam TypeEarth
Normal Storage0 acre-ft
NID IDIL50739

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: October 27, 2022
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

STEWART, DARR, BURRAY, JET DEVELOPMENT LLC

Private

Nearby Dams

Woodland Lake Dam

Macoupin, IL

Significant Hazard 27 ft

Evergreen Lake Dam

Macoupin, IL

Low Hazard 34 ft

Owens Lake Dam

Macoupin, IL

High Hazard 33 ft

Shaw Lake Dam

Macoupin, IL

High Hazard 23 ft

Mcadams Pond Dam 1

Macoupin, IL

Low Hazard 30 ft

Brighton Lake Dam

Macoupin, IL

High Hazard 25 ft

Briarwood Lake Dam

Macoupin, IL

Low Hazard 30 ft

Jones Lake Dam

Macoupin, IL

Significant Hazard 36 ft

Frequently Asked Questions

What is the hazard classification of Osage Lake Dam?

Osage 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 Osage Lake Dam?

Osage Lake Dam is owned by STEWART, DARR, BURRAY, JET DEVELOPMENT LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Osage Lake Dam?

Osage Lake Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Osage Lake Dam?

Osage Lake Dam has a dam height of 38 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 Osage Lake Dam last inspected?

Osage Lake Dam was last inspected on October 27, 2022. 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.