US Bridges

TR 188 over Prairie CR

Good

Iroquois County, Illinois · 2 MI E Lerable · Structure no. 038322700000000

Built
1975
50 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
96 ft
3 main spans
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 188 over Prairie CR is a concrete slab carrying TR 188 over Prairie CR in Iroquois County, Illinois. It was built in 1975, so it is 50 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 50 vehicles a day, roughly 66% of them trucks, projected to reach 126 by 2046. The structure is 96 ft (29.3 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 188
CrossesPrairie CR
Location2 MI E Lerable
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.90843, -87.82778
Functional classRural 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length96 ft (29.3 m)
Longest span34 ft (10.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic126 by 2046
Trucks66%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
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 TR 188 over Prairie CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is TR 188 over Prairie CR 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 April 2023.

How much traffic does TR 188 over Prairie CR carry?

About 50 vehicles per day (2022 count), of which roughly 66% are trucks.

How long is TR 188 over Prairie CR?

The structure is 96 ft (29.3 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.

Who owns TR 188 over Prairie CR?

It is owned by the Town or Township Highway Agency.