US Bridges

I 57 NB over Ch 17 Christian Chap

Good

Union County, Illinois · 0.6 MI S Ill 146 · Structure no. 091000900000000

Built
1959
66 years old, rebuilt 2002
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
5,950
2024 count
Owner
State
State Highway Agency

About this bridge

I 57 NB over Ch 17 Christian Chap is a steel continuous stringer/multi-beam or girder carrying I 57 NB over Ch 17 Christian Chap in Union County, Illinois. It was built in 1959 and reconstructed in 2002, so it is 66 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,950 vehicles a day, roughly 55% of them trucks, projected to reach 5,858 by 2046. The structure is 174 ft (53.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 57 NB
CrossesCh 17 Christian Chap
Location0.6 MI S Ill 146
RouteInterstate 57
Coordinates37.44086, -89.14826
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating45.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53.1 m)
Longest span66 ft (20.1 m)
Deck width39 ft (11.8 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,950 (2024)
Projected traffic5,858 by 2046
Trucks55%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 57 NB over Ch 17 Christian Chap built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2002.

What condition is I 57 NB over Ch 17 Christian Chap in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does I 57 NB over Ch 17 Christian Chap carry?

About 5,950 vehicles per day (2024 count), of which roughly 55% are trucks.

How long is I 57 NB over Ch 17 Christian Chap?

The structure is 174 ft (53.1 m) long with a longest span of 66 ft (20.1 m) and a deck 39 ft wide.

Who owns I 57 NB over Ch 17 Christian Chap?

It is owned by the State Highway Agency.