US Bridges

Garden Prairie Roa over I-90

Fair

Boone County, Illinois · 1 MI W. of Co. Line · Structure no. 004999300000000

Built
2015
10 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
232 ft
2 main spans
Daily traffic
150
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Garden Prairie Roa over I-90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Garden Prairie Roa over I-90 in Boone County, Illinois. It was built in 2015, so it is 10 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 150 vehicles a day, roughly 50% of them trucks, projected to reach 156 by 2046. The structure is 232 ft (70.6 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesGarden Prairie Roa
CrossesI-90
Location1 MI W. of Co. Line
RouteCounty Highway 0
CountyBoone County
StateIllinois
Coordinates42.21151, -88.72242
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length232 ft (70.6 m)
Longest span116 ft (35.3 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic156 by 2046
Trucks50%
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 Garden Prairie Roa over I-90 built?

It was built in 2015, making it 10 years old in 2025.

What condition is Garden Prairie Roa over I-90 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 2024.

How much traffic does Garden Prairie Roa over I-90 carry?

About 150 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Garden Prairie Roa over I-90?

The structure is 232 ft (70.6 m) long with a longest span of 116 ft (35.3 m) and a deck 35 ft wide.

Who owns Garden Prairie Roa over I-90?

It is owned by the State Toll Authority.