Gill Lake Dam

TRIB SOUTH BRANCH SUGAR CREEK· Schuyler, Illinois· Built 1974· Earth· 30 ft tall
Significant Hazard Recreation Private

Key Takeaway

Gill Lake Dam is classified as significant hazard in Illinois. It was completed in 1974 and is 52 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 30 ft (taller than 61.3% in IL)
Dam Length290 ft
Dam TypeEarth
Max Storage38 acre-ft
Normal Storage22 acre-ft
Year Completed1974 (52 years old)
NID IDIL00809

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: July 21, 2015
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

AL ESTOCK

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Gill Lake Dam?

Gill 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 Gill Lake Dam?

Gill Lake Dam is owned by AL ESTOCK (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Gill Lake Dam built?

Gill Lake Dam was completed in 1974, making it 52 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 Gill Lake Dam?

Gill 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 Gill Lake Dam?

Gill Lake Dam has a dam height of 30 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 Gill Lake Dam last inspected?

Gill Lake Dam was last inspected on July 21, 2015. 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.