Threw Lake Dam

TRIB NORTH FORK KICKAPOO CR· Knox, Illinois· Earth· 43 ft tall
Low Hazard Recreation Private

Key Takeaway

Threw Lake Dam is classified as low hazard in Illinois. Its primary use is recreation.

Physical Details

Dam Height 43 ft (taller than 86.6% in IL)
Dam Length700 ft
Dam TypeEarth
Max Storage755 acre-ft
Normal Storage536 acre-ft
Surface Area13 acres
Drainage Area1 sq mi
Max Discharge246 cfs
Year Modified2017
NID IDIL50671

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: September 28, 2018
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

LESLIE THREW

Private

Nearby Dams

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Salem Township Road 343 Dam

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Hillcrest Dairy Wastwater Lagoon Dam

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Glenview Farms Lake Dam

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Lake Holiday Dam

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Grahams Lake Dam

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Midland/Elm Mine/Fresh Water Lake Dam

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Midland/Elm Mine/ Slurry Lake 1 Dam

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Frequently Asked Questions

What is the hazard classification of Threw Lake Dam?

Threw Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Threw Lake Dam?

Threw Lake Dam is owned by LESLIE THREW (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Threw Lake Dam?

Threw 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 Threw Lake Dam?

Threw Lake Dam has a dam height of 43 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 Threw Lake Dam last inspected?

Threw Lake Dam was last inspected on September 28, 2018. 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.