US Bridges

11th Street over I-55 / I-72 / US 36

Fair

Sangamon County, Illinois · .45M E 6th St. · Structure no. 084003700000000

Built
1997
28 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
361 ft
2 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

11th Street over I-55 / I-72 / US 36 is a steel continuous stringer/multi-beam or girder carrying 11th Street over I-55 / I-72 / US 36 in Sangamon County, Illinois. It was built in 1997, so it is 28 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 7,600 vehicles a day, roughly 5% of them trucks, projected to reach 8,686 by 2046. The structure is 361 ft (110 m) long and 87 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries11th Street
CrossesI-55 / I-72 / US 36
Location.45M E 6th St.
CountySangamon County
StateIllinois
Coordinates39.74376, -89.63597
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 rating85 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length361 ft (110 m)
Longest span178 ft (54.2 m)
Deck width87 ft (26.4 m)
Roadway width75 ft (22.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic8,686 by 2046
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 11th Street over I-55 / I-72 / US 36 built?

It was built in 1997, making it 28 years old in 2025.

What condition is 11th Street over I-55 / I-72 / US 36 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 July 2024.

How much traffic does 11th Street over I-55 / I-72 / US 36 carry?

About 7,600 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 11th Street over I-55 / I-72 / US 36?

The structure is 361 ft (110 m) long with a longest span of 178 ft (54.2 m) and a deck 87 ft wide.

Who owns 11th Street over I-55 / I-72 / US 36?

It is owned by the State Highway Agency.