US Bridges

FAP 322(US 51) over I-72

Fair

Macon County, Illinois · S Edge Forsyth · Structure no. 058013600000000

Built
2011
14 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
254 ft
2 main spans
Daily traffic
24,400
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 322(US 51) over I-72 is a steel continuous stringer/multi-beam or girder carrying FAP 322(US 51) over I-72 in Macon County, Illinois. It was built in 2011, so it is 14 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 6 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 24,400 vehicles a day, roughly 6% of them trucks, projected to reach 24,846 by 2046. The structure is 254 ft (77.3 m) long and 120 ft wide.

Location

Open in Google Maps
CarriesFAP 322(US 51)
CrossesI-72
LocationS Edge Forsyth
RouteU.S. Route 51
CountyMacon County
StateIllinois
Coordinates39.90874, -88.95537
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length254 ft (77.3 m)
Longest span124 ft (37.9 m)
Deck width120 ft (36.5 m)
Roadway width102 ft (31.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,400 (2023)
Projected traffic24,846 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 FAP 322(US 51) over I-72 built?

It was built in 2011, making it 14 years old in 2025.

What condition is FAP 322(US 51) over I-72 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 January 2025.

How much traffic does FAP 322(US 51) over I-72 carry?

About 24,400 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is FAP 322(US 51) over I-72?

The structure is 254 ft (77.3 m) long with a longest span of 124 ft (37.9 m) and a deck 120 ft wide.

Who owns FAP 322(US 51) over I-72?

It is owned by the State Highway Agency.