US Bridges

FAI-55 NB over Rooks Creek

Fair

Livingston County, Illinois · 3 MI SW of Pontiac · Structure no. 053012500000000

Built
1972
53 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
282 ft
4 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

FAI-55 NB over Rooks Creek is a steel continuous stringer/multi-beam or girder carrying FAI-55 NB over Rooks Creek 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 10,500 vehicles a day, roughly 31% of them trucks, projected to reach 11,598 by 2035. The structure is 282 ft (86 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFAI-55 NB
CrossesRooks Creek
Location3 MI SW of Pontiac
RouteInterstate 55
CountyLivingston County
StateIllinois
Coordinates40.82885, -88.68569
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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length282 ft (86 m)
Longest span77 ft (23.5 m)
Deck width42 ft (12.7 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic11,598 by 2035
Trucks31%
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 NB over Rooks Creek built?

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

What condition is FAI-55 NB over Rooks Creek 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 February 2025.

How much traffic does FAI-55 NB over Rooks Creek carry?

About 10,500 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is FAI-55 NB over Rooks Creek?

The structure is 282 ft (86 m) long with a longest span of 77 ft (23.5 m) and a deck 42 ft wide.

Who owns FAI-55 NB over Rooks Creek?

It is owned by the State Highway Agency.