US Bridges

Ch 18 (school Rd) over Ditch

Good

Macon County, Illinois · 4.4 Mi. NE Argenta · Structure no. 058340600000000

Built
2020
5 years old
Condition
Good
inspected July 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Ch 18 (school Rd) over Ditch is a prestressed concrete box beam or girders - multiple carrying Ch 18 (school Rd) over Ditch in Macon County, Illinois. It was built in 2020, so it is 5 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 101 by 2046. The structure is 50 ft (15.1 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCh 18 (school Rd)
CrossesDitch
Location4.4 Mi. NE Argenta
RouteCounty Highway 0
CountyMacon County
StateIllinois
Coordinates40.01157, -88.75075
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating57.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length50 ft (15.1 m)
Longest span47 ft (14.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 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
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 18 (school Rd) over Ditch built?

It was built in 2020, making it 5 years old in 2025.

What condition is Ch 18 (school Rd) over Ditch 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 2022.

How much traffic does Ch 18 (school Rd) over Ditch carry?

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

How long is Ch 18 (school Rd) over Ditch?

The structure is 50 ft (15.1 m) long with a longest span of 47 ft (14.3 m) and a deck 24 ft wide.

Who owns Ch 18 (school Rd) over Ditch?

It is owned by the County Highway Agency.