Lewis Dam

TRIB FARMERS FORK· McDonough, Illinois· Earth· 28 ft tall
Low Hazard Recreation Private

Key Takeaway

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

Physical Details

Dam Height 28 ft (taller than 54.6% in IL)
Dam Length490 ft
Dam TypeEarth
Max Storage134 acre-ft
Normal Storage70 acre-ft
Surface Area10 acres
Drainage Area0 sq mi
Max Discharge355 cfs
NID IDIL50537

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: July 8, 2020
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

JERRY LEWIS

Private

Nearby Dams

Spring Lake Dam

McDonough, IL

Significant Hazard 46 ft

Randolph Pond Dam 1

McDonough, IL

Low Hazard 27 ft

Patrick Lake Dam

McDonough, IL

Low Hazard 19 ft

Cricketwood Green Lake Dam

McDonough, IL

Low Hazard 25 ft

Deer Ridge Dam

McDonough, IL

Low Hazard 67 ft

Gold Hills Dam

McDonough, IL

Low Hazard 33 ft

Little Swan Lake Dam

Warren, IL

Low Hazard 49 ft

Froghair Lake Dam

McDonough, IL

Low Hazard 27 ft

Frequently Asked Questions

What is the hazard classification of Lewis Dam?

Lewis 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 Lewis Dam?

Lewis Dam is owned by JERRY LEWIS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Lewis Dam?

Lewis 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 Lewis Dam?

Lewis Dam has a dam height of 28 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 Lewis Dam last inspected?

Lewis Dam was last inspected on July 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.