US Bridges

Ill 148 Exit 45 over Interstate 57

Fair

Williamson County, Illinois · 0.6 MI W of Ill 37 · Structure no. 100003900000000

Built
1960
65 years old, rebuilt 1999
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
251 ft
4 main spans
Daily traffic
6,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 148 Exit 45 over Interstate 57 is a steel continuous stringer/multi-beam or girder carrying Ill 148 Exit 45 over Interstate 57 in Williamson County, Illinois. It was built in 1960 and reconstructed in 1999, so it is 65 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 6,950 vehicles a day, roughly 16% of them trucks, projected to reach 5,808 by 2046. The structure is 251 ft (76.4 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIll 148 Exit 45
CrossesInterstate 57
Location0.6 MI W of Ill 37
RouteState Highway 148
CountyWilliamson County
StateIllinois
Coordinates37.6216, -88.9874
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length251 ft (76.4 m)
Longest span83 ft (25.4 m)
Deck width39 ft (11.8 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,950 (2023)
Projected traffic5,808 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$890,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ill 148 Exit 45 over Interstate 57 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1999.

What condition is Ill 148 Exit 45 over Interstate 57 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 October 2023.

How much traffic does Ill 148 Exit 45 over Interstate 57 carry?

About 6,950 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 148 Exit 45 over Interstate 57?

The structure is 251 ft (76.4 m) long with a longest span of 83 ft (25.4 m) and a deck 39 ft wide.

Who owns Ill 148 Exit 45 over Interstate 57?

It is owned by the State Highway Agency.