Keeven Lake Dam

PRAIRIE DU LONG CREEK· Monroe, Illinois· Built 1998· Earth· 25 ft tall
Significant Hazard Irrigation Private

Key Takeaway

Keeven Lake Dam is classified as significant hazard in Illinois. It was completed in 1998 and is 28 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 25 ft (taller than 42.6% in IL)
Dam Length300 ft
Dam TypeEarth
Max Storage140 acre-ft
Normal Storage71 acre-ft
Surface Area10 acres
Drainage Area1 sq mi
Max Discharge568 cfs
Year Completed1998 (28 years old)
NID IDIL50415

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: Yes
Last Inspection: June 22, 2021
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

THOMAS KEEVAN

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Keeven Lake Dam?

Keeven 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 Keeven Lake Dam?

Keeven Lake Dam is owned by THOMAS KEEVAN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Keeven Lake Dam built?

Keeven Lake Dam was completed in 1998, making it 28 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 Keeven Lake Dam?

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

How tall is Keeven Lake Dam?

Keeven Lake Dam has a dam height of 25 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 Keeven Lake Dam last inspected?

Keeven Lake Dam was last inspected on June 22, 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.