US Bridges

FAS 369 (400 N) over I-39/US 51

Fair

Marshall County, Illinois · 3 MI S of Il 17 · Structure no. 062005400000000

Built
1990
35 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
150
2024 count
Owner
State
State Highway Agency

About this bridge

FAS 369 (400 N) over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying FAS 369 (400 N) over I-39/US 51 in Marshall County, Illinois. It was built in 1990, so it is 35 years old, younger 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 150 vehicles a day, roughly 21% of them trucks, projected to reach 126 by 2046. The structure is 229 ft (69.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFAS 369 (400 N)
CrossesI-39/US 51
Location3 MI S of Il 17
RouteCounty Highway 0
CountyMarshall County
StateIllinois
Coordinates40.98427, -89.05628
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length229 ft (69.8 m)
Longest span166 ft (50.6 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic126 by 2046
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 369 (400 N) over I-39/US 51 built?

It was built in 1990, making it 35 years old in 2025.

What condition is FAS 369 (400 N) over I-39/US 51 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 March 2023.

How much traffic does FAS 369 (400 N) over I-39/US 51 carry?

About 150 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is FAS 369 (400 N) over I-39/US 51?

The structure is 229 ft (69.8 m) long with a longest span of 166 ft (50.6 m) and a deck 31 ft wide.

Who owns FAS 369 (400 N) over I-39/US 51?

It is owned by the State Highway Agency.