US Bridges

FAP 323(US 36) over FAU 7429(IL 48)

Fair

Macon County, Illinois · In Decatur · Structure no. 058012700000000

Built
1998
27 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
7,250
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 323(US 36) over FAU 7429(IL 48) is a steel stringer/multi-beam or girder carrying FAP 323(US 36) over FAU 7429(IL 48) in Macon County, Illinois. It was built in 1998, so it is 27 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 7,250 vehicles a day, roughly 9% of them trucks, projected to reach 7,929 by 2046. The structure is 77 ft (23.5 m) long and 84 ft wide.

Location

Open in Google Maps
CarriesFAP 323(US 36)
CrossesFAU 7429(IL 48)
LocationIn Decatur
RouteU.S. Route 36
CountyMacon County
StateIllinois
Coordinates39.84688, -88.97751
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length77 ft (23.5 m)
Longest span74 ft (22.6 m)
Deck width84 ft (25.7 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,250 (2023)
Projected traffic7,929 by 2046
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
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 323(US 36) over FAU 7429(IL 48) built?

It was built in 1998, making it 27 years old in 2025.

What condition is FAP 323(US 36) over FAU 7429(IL 48) 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 September 2023.

How much traffic does FAP 323(US 36) over FAU 7429(IL 48) carry?

About 7,250 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is FAP 323(US 36) over FAU 7429(IL 48)?

The structure is 77 ft (23.5 m) long with a longest span of 74 ft (22.6 m) and a deck 84 ft wide.

Who owns FAP 323(US 36) over FAU 7429(IL 48)?

It is owned by the State Highway Agency.