US Bridges

I-88 EB over S Br Kishwaukee Riv.

Good

DeKalb County, Illinois · W Edge of Dekalb · Structure no. 019990800000000

Built
1974
51 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
122 ft
3 main spans
Daily traffic
12,450
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-88 EB over S Br Kishwaukee Riv. is a prestressed concrete stringer/multi-beam or girder carrying I-88 EB over S Br Kishwaukee Riv. 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 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 12,450 vehicles a day, roughly 27% of them trucks, projected to reach 10,136 by 2046. The structure is 122 ft (37.2 m) long and 43 ft wide.

CarriesI-88 EB
CrossesS Br Kishwaukee Riv.
LocationW Edge of Dekalb
RouteInterstate 88
Coordinates41.90299, -88.77187
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating75.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span39 ft (11.9 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
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-88 EB over S Br Kishwaukee Riv. built?

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

What condition is I-88 EB over S Br Kishwaukee Riv. 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 August 2024.

How much traffic does I-88 EB over S Br Kishwaukee Riv. carry?

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

How long is I-88 EB over S Br Kishwaukee Riv.?

The structure is 122 ft (37.2 m) long with a longest span of 39 ft (11.9 m) and a deck 43 ft wide.

Who owns I-88 EB over S Br Kishwaukee Riv.?

It is owned by the State Toll Authority.