US Bridges

FAI-55 SB over Br W Fork Mazon R.

Fair

Livingston County, Illinois · 3 MI SW of Dwight · Structure no. 053013900000000

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
10,450
2023 count
Owner
State
State Highway Agency

About this bridge

FAI-55 SB over Br W Fork Mazon R. is a prestressed concrete stringer/multi-beam or girder carrying FAI-55 SB over Br W Fork Mazon R. in Livingston County, Illinois. It was built in 1972, so it is 53 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 6 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 10,450 vehicles a day, roughly 33% of them trucks, projected to reach 10,403 by 2046. The structure is 92 ft (28 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAI-55 SB
CrossesBr W Fork Mazon R.
Location3 MI SW of Dwight
RouteInterstate 55
CountyLivingston County
StateIllinois
Coordinates41.05028, -88.48169
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length92 ft (28 m)
Longest span86 ft (26.2 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,450 (2023)
Projected traffic10,403 by 2046
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAI-55 SB over Br W Fork Mazon R. built?

It was built in 1972, making it 53 years old in 2025.

What condition is FAI-55 SB over Br W Fork Mazon R. 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 FAI-55 SB over Br W Fork Mazon R. carry?

About 10,450 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is FAI-55 SB over Br W Fork Mazon R.?

The structure is 92 ft (28 m) long with a longest span of 86 ft (26.2 m) and a deck 42 ft wide.

Who owns FAI-55 SB over Br W Fork Mazon R.?

It is owned by the State Highway Agency.