Wonder Lake Dam

High HazardNot Available ConditionEmergency Action Plan: Yes

Location

StateIllinois
CountyMcHenry
Nearest CityWONDER LAKE
River/StreamNIPPERSINK CREEK
Coordinates42.40879, -88.34245

Physical Characteristics

Dam TypeEarth
NID Height27 ft
Dam Height27 ft
Dam Length1,050 ft
Year Completed1929 (97 years old)

Storage & Hydraulics

NID Storage10,194 acre-ft
Max Storage10,194 acre-ft
Normal Storage4,877 acre-ft
Surface Area728 acres
Drainage Area97 sq mi
Max Discharge8,471 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerMASTER PROPERTY OWNERS ASSOCIATION, INC.
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentNot Available
Last Inspection10/03/2025
Emergency Action PlanYes

Identifiers

NID IDIL00585
Federal IDIL00585
More InfoState Dam Safety Program

Nearby Dams

Wonder Lake Sediment Dewatering Facility Dam 1.9 mi High Wold Lake Dam 5.7 mi Low Kazimer Lake Dam 6.4 mi Significant Stratton Lock And Dam 8.3 mi Significant Black Tern Marsh Dam 8.7 mi Low Yellow Head Marsh Dam 8.8 mi Low Thunderbird Lake 1 Dam 9.9 mi Low Thunderbird Lake 2 Dam 10.0 mi Low Coopers Farm Sediment Storage Dam 10.7 mi High Kingsley Lake Dam 11.1 mi Low