Lake Mendota Dam

High HazardNot Available ConditionEmergency Action Plan: No

Location

StateIllinois
CountyLaSalle
Nearest CityMENDOTA
River/StreamMENDOTA CREEK
Coordinates41.55705, -89.12874

Physical Characteristics

Dam TypeEarth
NID Height17 ft
Dam Height17 ft
Dam Length2,430 ft
Year Completed1890 (136 years old)

Storage & Hydraulics

NID Storage246 acre-ft
Max Storage246 acre-ft
Normal Storage163 acre-ft
Surface Area17 acres
Drainage Area221 sq mi
Max Discharge860 cfs
Spillway TypeControlled

Ownership & Safety

PurposeRecreation
OwnerCITY OF MENDOTA
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentNot Available
Last Inspection04/29/2025
Emergency Action PlanNo

Identifiers

NID IDIL00223
Federal IDIL00223
More InfoState Dam Safety Program

Nearby Dams

Lake Kakusha Dam 0.4 mi High Mendota Agri-products Storage Lagoon 5 Dam 3.8 mi Low Bass Lake Dam 10.7 mi Low Woodhaven Lake Dam 11.5 mi Low Northeast Recreation Area Dam 14.8 mi High Stroyan Lake Dam 14.9 mi Low