Stonehenge Lake Dam

Significant HazardNot Available ConditionEmergency Action Plan: Yes

Location

StateIllinois
CountySt. Clair
Nearest CityWATERLOO
River/StreamPRAIRIE DU LONG CREEK
Coordinates38.39835, -90.12496

Physical Characteristics

Dam TypeEarth
NID Height33 ft
Dam Height33 ft
Dam Length320 ft
Year Completed2008 (18 years old)

Storage & Hydraulics

NID Storage200 acre-ft
Max Storage200 acre-ft
Normal Storage95 acre-ft
Surface Area18 acres
Drainage Area4 sq mi
Max Discharge2,846 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerSTONEHENGE LAND TRUST II
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentNot Available
Last Inspection12/02/2021
Emergency Action PlanYes

Identifiers

NID IDIL50575
Federal IDIL50575
More InfoState Dam Safety Program

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