US Bridges

Pearl ST over I 90

Good

Boone County, Illinois · 4 MI E of US 20 · Structure no. 004996100000000

Built
2014
11 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
235 ft
2 main spans
Daily traffic
650
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pearl ST over I 90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Pearl ST over I 90 in Boone County, Illinois. It was built in 2014, so it is 11 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 650 vehicles a day, roughly 14% of them trucks, projected to reach 3,120 by 2046. The structure is 235 ft (71.5 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPearl ST
CrossesI 90
Location4 MI E of US 20
Coordinates42.23366, -88.84172
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length235 ft (71.5 m)
Longest span117 ft (35.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic3,120 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Pearl ST over I 90 built?

It was built in 2014, making it 11 years old in 2025.

What condition is Pearl ST over I 90 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 July 2023.

How much traffic does Pearl ST over I 90 carry?

About 650 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Pearl ST over I 90?

The structure is 235 ft (71.5 m) long with a longest span of 117 ft (35.7 m) and a deck 43 ft wide.

Who owns Pearl ST over I 90?

It is owned by the State Toll Authority.