US Bridges

Spring Center RD over I 90

Good

Boone County, Illinois · 3 MI W Mchenry CO · Structure no. 004996400000000

Built
2016
9 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
262 ft
2 main spans
Daily traffic
75
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Spring Center RD over I 90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Spring Center RD over I 90 in Boone County, Illinois. It was built in 2016, so it is 9 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 75 vehicles a day, roughly 23% of them trucks, projected to reach 52 by 2046. The structure is 262 ft (79.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSpring Center RD
CrossesI 90
Location3 MI W Mchenry CO
RouteCounty Highway 0
CountyBoone County
StateIllinois
Coordinates42.22509, -88.76397
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.
Superstructure8 Very GoodNo problems noted.
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 rating63.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length262 ft (79.9 m)
Longest span133 ft (40.5 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic52 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Spring Center RD over I 90 built?

It was built in 2016, making it 9 years old in 2025.

What condition is Spring Center RD 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 Spring Center RD over I 90 carry?

About 75 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is Spring Center RD over I 90?

The structure is 262 ft (79.9 m) long with a longest span of 133 ft (40.5 m) and a deck 35 ft wide.

Who owns Spring Center RD over I 90?

It is owned by the State Toll Authority.