US Bridges

Il 171 (archer Ave over RR - CSXT Spur Argo

Good

Cook County, Illinois · 0.1 M S of 63rd ST · Structure no. 016254400000000

Built
1987
38 years old, rebuilt 2019
Condition
Good
inspected February 2022
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
28,400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 171 (archer Ave over RR - CSXT Spur Argo is a concrete slab carrying Il 171 (archer Ave over RR - CSXT Spur Argo in Cook County, Illinois. It was built in 1987 and reconstructed in 2019, so it is 38 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 28,400 vehicles a day, roughly 9% of them trucks, projected to reach 26,159 by 2046. The structure is 26 ft (7.9 m) long and 69 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIl 171 (archer Ave
CrossesRR - CSXT Spur Argo
Location0.1 M S of 63rd ST
RouteState Highway 171
CountyCook County
StateIllinois
Coordinates41.77506, -87.81534
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.1 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span22 ft (6.7 m)
Deck width69 ft (21.1 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,400 (2023)
Projected traffic26,159 by 2046
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$40,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 171 (archer Ave over RR - CSXT Spur Argo built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 2019.

What condition is Il 171 (archer Ave over RR - CSXT Spur Argo in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2022.

How much traffic does Il 171 (archer Ave over RR - CSXT Spur Argo carry?

About 28,400 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il 171 (archer Ave over RR - CSXT Spur Argo?

The structure is 26 ft (7.9 m) long with a longest span of 22 ft (6.7 m) and a deck 69 ft wide.

Who owns Il 171 (archer Ave over RR - CSXT Spur Argo?

It is owned by the State Highway Agency.