US Bridges

I- 55 Stevenson over RR - Cn Spur

Fair

Cook County, Illinois · 0.5 M W Il 43 · Structure no. 016202100000000

Built
1964
61 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
70,750
2024 count
Owner
State
State Highway Agency

About this bridge

I- 55 Stevenson over RR - Cn Spur is a concrete culvert carrying I- 55 Stevenson over RR - Cn Spur in Cook County, Illinois. It was built in 1964, so it is 61 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 70,750 vehicles a day, roughly 10% of them trucks, projected to reach 66,812 by 2046. The structure is 23 ft (7.1 m) long and 114 ft wide.

CarriesI- 55 Stevenson
CrossesRR - Cn Spur
Location0.5 M W Il 43
RouteInterstate 55
Coordinates41.79652, -87.80816
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length23 ft (7.1 m)
Longest span22 ft (6.8 m)
Deck width114 ft (34.7 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,750 (2024)
Projected traffic66,812 by 2046
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I- 55 Stevenson over RR - Cn Spur built?

It was built in 1964, making it 61 years old in 2025.

What condition is I- 55 Stevenson over RR - Cn Spur in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does I- 55 Stevenson over RR - Cn Spur carry?

About 70,750 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is I- 55 Stevenson over RR - Cn Spur?

The structure is 23 ft (7.1 m) long with a longest span of 22 ft (6.8 m) and a deck 114 ft wide.

Who owns I- 55 Stevenson over RR - Cn Spur?

It is owned by the State Highway Agency.