US Bridges

FAI 57 NB over Louis Creek

Poor

Iroquois County, Illinois · 7.33 M S Onarga Int · Structure no. 038015200000000

Built
1968
57 years old
Condition
Poor
inspected January 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
8,750
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 57 NB over Louis Creek is a concrete continuous slab carrying FAI 57 NB over Louis Creek in Iroquois County, Illinois. It was built in 1968, so it is 57 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 8,750 vehicles a day, roughly 42% of them trucks, projected to reach 8,737 by 2046. The structure is 93 ft (28.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAI 57 NB
CrossesLouis Creek
Location7.33 M S Onarga Int
RouteInterstate 57
CountyIroquois County
StateIllinois
Coordinates40.61258, -88.04534
Functional classRural 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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 12 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 rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.3 m)
Longest span34 ft (10.4 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,750 (2023)
Projected traffic8,737 by 2046
Trucks42%
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 57 NB over Louis Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is FAI 57 NB over Louis Creek 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 2024.

How much traffic does FAI 57 NB over Louis Creek carry?

About 8,750 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is FAI 57 NB over Louis Creek?

The structure is 93 ft (28.3 m) long with a longest span of 34 ft (10.4 m) and a deck 43 ft wide.

Who owns FAI 57 NB over Louis Creek?

It is owned by the State Highway Agency.