US Bridges

I-88 EB over C&nw RR

Fair

DeKalb County, Illinois · South of Dekalb · Structure no. 019991300000000

Built
1974
51 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
12,450
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-88 EB over C&nw RR is a prestressed concrete continuous stringer/multi-beam or girder carrying I-88 EB over C&nw RR in DeKalb County, Illinois. It was built in 1974, so it is 51 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 5 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 12,450 vehicles a day, roughly 27% of them trucks, projected to reach 10,136 by 2046. The structure is 154 ft (46.9 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesI-88 EB
CrossesC&nw RR
LocationSouth of Dekalb
RouteInterstate 88
CountyDeKalb County
StateIllinois
Coordinates41.90261, -88.75114
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span50 ft (15.2 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,450 (2023)
Projected traffic10,136 by 2046
Trucks27%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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-88 EB over C&nw RR built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-88 EB over C&nw RR 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 July 2023.

How much traffic does I-88 EB over C&nw RR carry?

About 12,450 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is I-88 EB over C&nw RR?

The structure is 154 ft (46.9 m) long with a longest span of 50 ft (15.2 m) and a deck 43 ft wide.

Who owns I-88 EB over C&nw RR?

It is owned by the State Toll Authority.