Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam

TRIB GRASSY BRANCH· Clinton, Illinois· Built 1975· Rockfill· 15 ft tall
Low Hazard Recreation Private

Key Takeaway

Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam is classified as low hazard in Illinois. It was completed in 1975 and is 51 years old. Its primary use is recreation.

Physical Details

Dam Height 15 ft (taller than 16.3% in IL)
Dam Length800 ft
Dam TypeRockfill
Max Storage423 acre-ft
Normal Storage187 acre-ft
Surface Area545 acres
Drainage Area1 sq mi
Max Discharge230 cfs
Year Completed1975 (51 years old)
NID IDIL50527

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: June 6, 2023
State Regulated: Yes
Regulatory Agency: IDNR

Ownership

EXXONMOBIL ENVIRONMENTAL SERVICES COMPAN

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam?

Exxonmobil Coal Usa/Mine 2/Freshwater 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 Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam?

Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam is owned by EXXONMOBIL ENVIRONMENTAL SERVICES COMPAN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam built?

Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam was completed in 1975, making it 51 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 Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam?

Exxonmobil Coal Usa/Mine 2/Freshwater 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 Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam?

Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam has a dam height of 15 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 Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam last inspected?

Exxonmobil Coal Usa/Mine 2/Freshwater Lake Dam was last inspected on June 6, 2023. 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.