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Main Street over Crystal Lake Overflo

McHenry County, Illinois · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Main Street over Crystal Lake Overflo in McHenry County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2020, making it 5 years old at the 2025 inventory.
It carries about 5,750 vehicles a day (traffic count year 2023).
Its listed owner is a city or municipal highway agency.
It is one of 92 of the 227 inventoried bridges in McHenry County rated good (40.5%); 48 (21.1%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 61 ft
Location	200 ft S of IL 62
NBI structure number	056601400000000
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.

Bridge	Built	Vehicles/day	Condition
Il 62 over Fox River	1988	43,100	Fair
Il 31 over RR - UP	1971	34,400	Fair
Algonquin Road over Woods Creek	2004	31,600	Fair
Algonquin Road over Crystal Creek	2004	31,600	Fair
Algonquin Road over Gravel Pit Creek	2004	31,600	Fair
Rakow Rd (ch V-29) over Crystal Creek	1994	30,600	Good