US Bridges

TR 155 over I55 Rt 66 & Icg RR

Fair

Grundy County, Illinois · 3 MI SW of Gardner · Structure no. 032007800000000

Built
1979
46 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
531 ft
4 main spans
Daily traffic
200
2024 count
Owner
State
State Highway Agency

About this bridge

TR 155 over I55 Rt 66 & Icg RR is a steel continuous stringer/multi-beam or girder carrying TR 155 over I55 Rt 66 & Icg RR in Grundy County, Illinois. It was built in 1979, so it is 46 years old, older 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 5 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 200 vehicles a day, roughly 54% of them trucks, projected to reach 180 by 2046. The structure is 531 ft (162 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 155
CrossesI55 Rt 66 & Icg RR
Location3 MI SW of Gardner
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.15507, -88.35032
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 15
Structure length531 ft (162 m)
Longest span120 ft (36.6 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic180 by 2046
Trucks54%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 155 over I55 Rt 66 & Icg RR built?

It was built in 1979, making it 46 years old in 2025.

What condition is TR 155 over I55 Rt 66 & Icg RR 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 February 2023.

How much traffic does TR 155 over I55 Rt 66 & Icg RR carry?

About 200 vehicles per day (2024 count), of which roughly 54% are trucks.

How long is TR 155 over I55 Rt 66 & Icg RR?

The structure is 531 ft (162 m) long with a longest span of 120 ft (36.6 m) and a deck 30 ft wide.

Who owns TR 155 over I55 Rt 66 & Icg RR?

It is owned by the State Highway Agency.