US Bridges

FAI-57 NB over Ill RTE 17

Poor

Kankakee County, Illinois · Ill 17 Inter · Structure no. 046000600000000

Built
1955
70 years old, rebuilt 1989
Condition
Poor
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
166 ft
3 main spans
Daily traffic
11,650
2023 count
Owner
State
State Highway Agency

About this bridge

FAI-57 NB over Ill RTE 17 is a steel continuous stringer/multi-beam or girder carrying FAI-57 NB over Ill RTE 17 in Kankakee County, Illinois. It was built in 1955 and reconstructed in 1989, so it is 70 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,650 vehicles a day, roughly 29% of them trucks, projected to reach 12,546 by 2046. The structure is 166 ft (50.6 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAI-57 NB
CrossesIll RTE 17
LocationIll 17 Inter
RouteInterstate 57
Coordinates41.11884, -87.83556
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionJanuary 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating49.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length166 ft (50.6 m)
Longest span63 ft (19.1 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,650 (2023)
Projected traffic12,546 by 2046
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAI-57 NB over Ill RTE 17 built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1989.

What condition is FAI-57 NB over Ill RTE 17 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2023.

How much traffic does FAI-57 NB over Ill RTE 17 carry?

About 11,650 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is FAI-57 NB over Ill RTE 17?

The structure is 166 ft (50.6 m) long with a longest span of 63 ft (19.1 m) and a deck 51 ft wide.

Who owns FAI-57 NB over Ill RTE 17?

It is owned by the State Highway Agency.