US Bridges

Wilmington/River R over I- 55

Good

Will County, Illinois · 2.5 M N IL-129 · Structure no. 099464100000000

Built
2003
22 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
2 main spans
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

Wilmington/River R over I- 55 is a steel continuous stringer/multi-beam or girder carrying Wilmington/River R over I- 55 in Will County, Illinois. It was built in 2003, so it is 22 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 7,500 vehicles a day, roughly 36% of them trucks, projected to reach 13,320 by 2046. The structure is 215 ft (65.4 m) long and 61 ft wide.

CarriesWilmington/River R
CrossesI- 55
Location2.5 M N IL-129
Coordinates41.35247, -88.19238
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating47.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length215 ft (65.4 m)
Longest span113 ft (34.4 m)
Deck width61 ft (18.5 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic13,320 by 2046
Trucks36%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 Wilmington/River R over I- 55 built?

It was built in 2003, making it 22 years old in 2025.

What condition is Wilmington/River R over I- 55 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 April 2023.

How much traffic does Wilmington/River R over I- 55 carry?

About 7,500 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is Wilmington/River R over I- 55?

The structure is 215 ft (65.4 m) long with a longest span of 113 ft (34.4 m) and a deck 61 ft wide.

Who owns Wilmington/River R over I- 55?

It is owned by the State Highway Agency.