US Bridges

I 57 NB & US 51 NB over Cnic RR

Fair

Pulaski County, Illinois · 0.2 MI N FAS 2936 · Structure no. 077000300000000

Built
1966
59 years old
Condition
Fair
inspected January 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 & US 51 NB over Cnic RR is a steel continuous stringer/multi-beam or girder carrying I 57 NB & US 51 NB over Cnic RR in Pulaski County, Illinois. It was built in 1966, so it is 59 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 5,950 vehicles a day, roughly 56% of them trucks, projected to reach 6,767 by 2046. The structure is 174 ft (53 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 57 NB & US 51 NB
CrossesCnic RR
Location0.2 MI N FAS 2936
RouteInterstate 57
CountyPulaski County
StateIllinois
Coordinates37.09983, -89.18789
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length174 ft (53 m)
Longest span62 ft (18.9 m)
Deck width42 ft (12.7 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,950 (2024)
Projected traffic6,767 by 2046
Trucks56%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 I 57 NB & US 51 NB over Cnic RR built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 57 NB & US 51 NB over Cnic RR 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 January 2024.

How much traffic does I 57 NB & US 51 NB over Cnic RR carry?

About 5,950 vehicles per day (2024 count), of which roughly 56% are trucks.

How long is I 57 NB & US 51 NB over Cnic RR?

The structure is 174 ft (53 m) long with a longest span of 62 ft (18.9 m) and a deck 42 ft wide.

Who owns I 57 NB & US 51 NB over Cnic RR?

It is owned by the State Highway Agency.