US Bridges

St. Charles Rd. over I-355

Fair

DuPage County, Illinois · 0.17M.W. of IL-53 · Structure no. 022995500000000

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
234 ft
2 main spans
Daily traffic
11,600
2024 count
Owner
County
County Highway Agency

About this bridge

St. Charles Rd. over I-355 is a prestressed concrete box beam or girders - multiple carrying St. Charles Rd. over I-355 in DuPage County, Illinois. It was built in 1989, so it is 36 years old, younger 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 11,600 vehicles a day, roughly 3% of them trucks, projected to reach 7,171 by 2046. The structure is 234 ft (71.3 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSt. Charles Rd.
CrossesI-355
Location0.17M.W. of IL-53
CountyDuPage County
StateIllinois
Coordinates41.88901, -88.0375
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length234 ft (71.3 m)
Longest span115 ft (35.1 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,600 (2024)
Projected traffic7,171 by 2046
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 St. Charles Rd. over I-355 built?

It was built in 1989, making it 36 years old in 2025.

What condition is St. Charles Rd. over I-355 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 May 2023.

How much traffic does St. Charles Rd. over I-355 carry?

About 11,600 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is St. Charles Rd. over I-355?

The structure is 234 ft (71.3 m) long with a longest span of 115 ft (35.1 m) and a deck 64 ft wide.

Who owns St. Charles Rd. over I-355?

It is owned by the County Highway Agency.