Exxonmobil Coal Usa/mine 2/freshwater Lake Dam

Low HazardNot Available ConditionEmergency Action Plan: No

Location

StateIllinois
CountyClinton
Nearest CityDAMIANSVILLE
River/StreamTRIB GRASSY BRANCH
Coordinates38.53631, -89.60401

Physical Characteristics

Dam TypeRockfill
NID Height15 ft
Dam Height15 ft
Dam Length800 ft
Year Completed1975 (51 years old)

Storage & Hydraulics

NID Storage423 acre-ft
Max Storage423 acre-ft
Normal Storage187 acre-ft
Surface Area545 acres
Drainage Area1 sq mi
Max Discharge230 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerEXXONMOBIL ENVIRONMENTAL SERVICES COMPAN
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot Available
Last Inspection07/24/2025
Emergency Action PlanNo

Identifiers

NID IDIL50527
Federal IDIL50527
More InfoState Dam Safety Program

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