US Bridges

Ch 18(SCHOOL Rd) over I-72

Good

Macon County, Illinois · 1.5 MI W of CO Line · Structure no. 058009700000000

Built
1975
50 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 ft
2 main spans
Daily traffic
100
2020 count
Owner
State
State Highway Agency

About this bridge

Ch 18(SCHOOL Rd) over I-72 is a steel continuous stringer/multi-beam or girder carrying Ch 18(SCHOOL Rd) over I-72 in Macon County, Illinois. It was built in 1975, so it is 50 years old, older 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 101 by 2046. The structure is 315 ft (96.1 m) long and 30 ft wide.

CarriesCh 18(SCHOOL Rd)
CrossesI-72
Location1.5 MI W of CO Line
RouteCounty Highway 0
Coordinates40.0117, -88.77136
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.1 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length315 ft (96.1 m)
Longest span159 ft (48.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic101 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Ch 18(SCHOOL Rd) over I-72 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ch 18(SCHOOL Rd) over I-72 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 July 2024.

How much traffic does Ch 18(SCHOOL Rd) over I-72 carry?

About 100 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Ch 18(SCHOOL Rd) over I-72?

The structure is 315 ft (96.1 m) long with a longest span of 159 ft (48.4 m) and a deck 30 ft wide.

Who owns Ch 18(SCHOOL Rd) over I-72?

It is owned by the State Highway Agency.