US Bridges

SB Main ST over I-155

Fair

Tazewell County, Illinois · 1.6 MI S of Il 98 · Structure no. 090013100000000

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
459 ft
2 main spans
Daily traffic
1,450
2023 count
Owner
State
State Highway Agency

About this bridge

SB Main ST over I-155 is a steel continuous box beam or girders - single or spread carrying SB Main ST over I-155 in Tazewell County, Illinois. It was built in 1990, so it is 35 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 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 1,450 vehicles a day, roughly 6% of them trucks, projected to reach 1,313 by 2046. The structure is 459 ft (140 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSB Main ST
CrossesI-155
Location1.6 MI S of Il 98
CountyTazewell County
StateIllinois
Coordinates40.58127, -89.47836
Functional classUrban Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating36.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length459 ft (140 m)
Longest span220 ft (67 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2023)
Projected traffic1,313 by 2046
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 SB Main ST over I-155 built?

It was built in 1990, making it 35 years old in 2025.

What condition is SB Main ST over I-155 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 August 2023.

How much traffic does SB Main ST over I-155 carry?

About 1,450 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SB Main ST over I-155?

The structure is 459 ft (140 m) long with a longest span of 220 ft (67 m) and a deck 29 ft wide.

Who owns SB Main ST over I-155?

It is owned by the State Highway Agency.