US Bridges

FAS 323 Ch 40 over Coon CR

Good

Iroquois County, Illinois · 2.19 MI W of Il 1 · Structure no. 038019600000000

Built
1991
34 years old
Condition
Good
inspected August 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
113 ft
3 main spans
Daily traffic
650
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 323 Ch 40 over Coon CR is a steel continuous stringer/multi-beam or girder carrying FAS 323 Ch 40 over Coon CR in Iroquois County, Illinois. It was built in 1991, so it is 34 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 650 vehicles a day, roughly 15% of them trucks, projected to reach 833 by 2046. The structure is 113 ft (34.3 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFAS 323 Ch 40
CrossesCoon CR
Location2.19 MI W of Il 1
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.71464, -87.72558
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.3 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2022)
Projected traffic833 by 2046
Trucks15%
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 FAS 323 Ch 40 over Coon CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is FAS 323 Ch 40 over Coon CR 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 2022.

How much traffic does FAS 323 Ch 40 over Coon CR carry?

About 650 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is FAS 323 Ch 40 over Coon CR?

The structure is 113 ft (34.3 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns FAS 323 Ch 40 over Coon CR?

It is owned by the County Highway Agency.