US Bridges

Sangamon Av. (wb) over Illinois Central RR

Good

Sangamon County, Illinois · .25M W I-55 · Structure no. 084051100000000

Built
2003
22 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
3 main spans
Daily traffic
16,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sangamon Av. (wb) over Illinois Central RR is a steel continuous stringer/multi-beam or girder carrying Sangamon Av. (wb) over Illinois Central RR in Sangamon County, Illinois. It was built in 2003, so it is 22 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 16,700 vehicles a day, roughly 7% of them trucks, projected to reach 8,939 by 2046. The structure is 248 ft (75.6 m) long and 61 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSangamon Av. (wb)
CrossesIllinois Central RR
Location.25M W I-55
CountySangamon County
StateIllinois
Coordinates39.83139, -89.59836
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length248 ft (75.6 m)
Longest span109 ft (33.2 m)
Deck width61 ft (18.7 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,700 (2022)
Projected traffic8,939 by 2046
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sangamon Av. (wb) over Illinois Central RR built?

It was built in 2003, making it 22 years old in 2025.

What condition is Sangamon Av. (wb) over Illinois Central RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Sangamon Av. (wb) over Illinois Central RR carry?

About 16,700 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sangamon Av. (wb) over Illinois Central RR?

The structure is 248 ft (75.6 m) long with a longest span of 109 ft (33.2 m) and a deck 61 ft wide.

Who owns Sangamon Av. (wb) over Illinois Central RR?

It is owned by the State Highway Agency.