US Bridges

FAS 775 (marine RD over FAI 70

Fair

Madison County, Illinois · 1.25 M E RTE 4 · Structure no. 060016400000000

Built
1962
63 years old, rebuilt 1993
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
246 ft
4 main spans
Daily traffic
775
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 775 (marine RD over FAI 70 is a steel continuous stringer/multi-beam or girder carrying FAS 775 (marine RD over FAI 70 in Madison County, Illinois. It was built in 1962 and reconstructed in 1993, so it is 63 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.

It carries about 775 vehicles a day, roughly 8% of them trucks, projected to reach 829 by 2046. The structure is 246 ft (74.9 m) long and 31 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesFAS 775 (marine RD
CrossesFAI 70
Location1.25 M E RTE 4
RouteCounty Highway 0
CountyMadison County
StateIllinois
Coordinates38.764, -89.77786
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length246 ft (74.9 m)
Longest span74 ft (22.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic775 (2021)
Projected traffic829 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAS 775 (marine RD over FAI 70 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1993.

What condition is FAS 775 (marine RD over FAI 70 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 December 2024.

How much traffic does FAS 775 (marine RD over FAI 70 carry?

About 775 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is FAS 775 (marine RD over FAI 70?

The structure is 246 ft (74.9 m) long with a longest span of 74 ft (22.7 m) and a deck 31 ft wide.

Who owns FAS 775 (marine RD over FAI 70?

It is owned by the State Highway Agency.