US Bridges

I-72 (wb) over IL-48 & Decatur Centralr

Fair

Macon County, Illinois · 2.5 MI E Forsyth · Structure no. 058008500000000

Built
1974
51 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
347 ft
5 main spans
Daily traffic
5,750
2023 count
Owner
State
State Highway Agency

About this bridge

I-72 (wb) over IL-48 & Decatur Centralr is a steel continuous stringer/multi-beam or girder carrying I-72 (wb) over IL-48 & Decatur Centralr in Macon County, Illinois. It was built in 1974, so it is 51 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 5,750 vehicles a day, roughly 27% of them trucks, projected to reach 5,656 by 2046. The structure is 347 ft (105.8 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-72 (wb)
CrossesIL-48 & Decatur Centralr
Location2.5 MI E Forsyth
RouteInterstate 72
CountyMacon County
StateIllinois
Coordinates39.91013, -88.89411
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length347 ft (105.8 m)
Longest span86 ft (26.3 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,750 (2023)
Projected traffic5,656 by 2046
Trucks27%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-72 (wb) over IL-48 & Decatur Centralr built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-72 (wb) over IL-48 & Decatur Centralr 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 December 2023.

How much traffic does I-72 (wb) over IL-48 & Decatur Centralr carry?

About 5,750 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is I-72 (wb) over IL-48 & Decatur Centralr?

The structure is 347 ft (105.8 m) long with a longest span of 86 ft (26.3 m) and a deck 42 ft wide.

Who owns I-72 (wb) over IL-48 & Decatur Centralr?

It is owned by the State Highway Agency.