US Bridges

FAI 270 over Mississippi River

FairClosed to traffic

Madison County, Illinois · N. of Granite City · Structure no. 060003500000000

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
5,411 ft
21 main spans
Daily traffic
46,200
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 270 over Mississippi River is a steel continuous girder and floorbeam system carrying FAI 270 over Mississippi River in Madison County, Illinois. It was built in 1966, so it is 59 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: closed to all traffic.

It carries about 46,200 vehicles a day, roughly 20% of them trucks, projected to reach 52,644 by 2046. The structure is 5,411 ft (1,649.3 m) long and 63 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

CarriesFAI 270
CrossesMississippi River
LocationN. of Granite City
RouteInterstate 270
Coordinates38.76434, -90.1722
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating28.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans21 (+22 approach)
Design loadHS 20
Structure length5,411 ft (1,649.3 m)
Longest span242 ft (73.9 m)
Deck width63 ft (19.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,200 (2023)
Projected traffic52,644 by 2046
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$26.2 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FAI 270 over Mississippi River built?

It was built in 1966, making it 59 years old in 2025.

What condition is FAI 270 over Mississippi River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does FAI 270 over Mississippi River carry?

About 46,200 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is FAI 270 over Mississippi River?

The structure is 5,411 ft (1,649.3 m) long with a longest span of 242 ft (73.9 m) and a deck 63 ft wide.

Who owns FAI 270 over Mississippi River?

It is owned by the State Highway Agency.