US Bridges

Il 48(FAU 7429) over Sangamon River

Fair

Macon County, Illinois · 0.5 MI N. of ILL-105 · Structure no. 058003700000000

Built
1929
96 years old, rebuilt 1992
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
492 ft
8 main spans
Daily traffic
8,850
2023 count
Owner
State
State Highway Agency

About this bridge

Il 48(FAU 7429) over Sangamon River is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 48(FAU 7429) over Sangamon River in Macon County, Illinois. It was built in 1929 and reconstructed in 1992, so it is 96 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 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 8,850 vehicles a day, roughly 2% of them trucks, projected to reach 9,040 by 2046. The structure is 492 ft (149.9 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIl 48(FAU 7429)
CrossesSangamon River
Location0.5 MI N. of ILL-105
RouteState Highway 48
CountyMacon County
StateIllinois
Coordinates39.83133, -88.97657
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length492 ft (149.9 m)
Longest span74 ft (22.5 m)
Deck width38 ft (11.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,850 (2023)
Projected traffic9,040 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Il 48(FAU 7429) over Sangamon River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1992.

What condition is Il 48(FAU 7429) over Sangamon River 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 April 2024.

How much traffic does Il 48(FAU 7429) over Sangamon River carry?

About 8,850 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Il 48(FAU 7429) over Sangamon River?

The structure is 492 ft (149.9 m) long with a longest span of 74 ft (22.5 m) and a deck 38 ft wide.

Who owns Il 48(FAU 7429) over Sangamon River?

It is owned by the State Highway Agency.