US Bridges

FAS 321 Ch 4 over Langan Creek

Good

Iroquois County, Illinois · 2.66 MI W of US 54 · Structure no. 038360700000000

Built
2007
18 years old
Condition
Good
inspected September 2021
Type
Slab
Concrete Continuous
Length
96 ft
3 main spans
Daily traffic
325
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 321 Ch 4 over Langan Creek is a concrete continuous slab carrying FAS 321 Ch 4 over Langan Creek in Iroquois County, Illinois. It was built in 2007, so it is 18 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 325 vehicles a day, roughly 6% of them trucks, projected to reach 303 by 2046. The structure is 96 ft (29.3 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAS 321 Ch 4
CrossesLangan Creek
Location2.66 MI W of US 54
RouteCounty Highway 0
Coordinates40.93476, -87.98483
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 inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span36 ft (11 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2022)
Projected traffic303 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 321 Ch 4 over Langan Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is FAS 321 Ch 4 over Langan Creek 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 September 2021.

How much traffic does FAS 321 Ch 4 over Langan Creek carry?

About 325 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is FAS 321 Ch 4 over Langan Creek?

The structure is 96 ft (29.3 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns FAS 321 Ch 4 over Langan Creek?

It is owned by the County Highway Agency.