US Bridges

FAU 9172 over CSX RR and City ST

Good

St. Clair County, Illinois · City of Ofallon · Structure no. 082650500000000

Built
1998
27 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
188 ft
2 main spans
Daily traffic
3,350
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 9172 over CSX RR and City ST is a steel continuous stringer/multi-beam or girder carrying FAU 9172 over CSX RR and City ST in St. Clair County, Illinois. It was built in 1998, so it is 27 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 3,350 vehicles a day, roughly 2% of them trucks, projected to reach 3,788 by 2046. The structure is 188 ft (57.2 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAU 9172
CrossesCSX RR and City ST
LocationCity of Ofallon
CountySt. Clair County
StateIllinois
Coordinates38.59123, -89.89249
Functional classUrban 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.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length188 ft (57.2 m)
Longest span98 ft (29.9 m)
Deck width38 ft (11.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,350 (2023)
Projected traffic3,788 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 FAU 9172 over CSX RR and City ST built?

It was built in 1998, making it 27 years old in 2025.

What condition is FAU 9172 over CSX RR and City ST 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 FAU 9172 over CSX RR and City ST carry?

About 3,350 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is FAU 9172 over CSX RR and City ST?

The structure is 188 ft (57.2 m) long with a longest span of 98 ft (29.9 m) and a deck 38 ft wide.

Who owns FAU 9172 over CSX RR and City ST?

It is owned by the City or Municipal Highway Agency.