Home › Illinois › Will County › Il 171 over Long Run Creek

Il 171 over Long Run Creek

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

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

Il 171 over Long Run Creek in Will 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 2017, making it 8 years old at the 2025 inventory.
It carries about 14,200 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 284 of the 656 inventoried bridges in Will County rated good (43.3%); 65 (9.9%) 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 246 ft
Location	.05 M S of Cnty Line
NBI structure number	099053700000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I- 55 over Il 53	1980	108,500	Fair
I- 80 over Creek	1967	96,000	Fair
I- 80 over Marley Creek	1966	94,400	Good
I-355 over I55 Rmp to NBI355	2007	83,900	Fair
I- 55 over Lily Cache Creek	2007	83,500	Fair
I- 55 over Joliet Rd	1955	73,200	Poor