US Bridges

I 57 NB over ILL3/US 51-CS 6010A-CNIC

Fair

Alexander County, Illinois · Cairo Interchange · Structure no. 002002300000000

Built
1978
47 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,017 ft
30 main spans
Daily traffic
7,500
2024 count
Owner
State
State Highway Agency

About this bridge

I 57 NB over ILL3/US 51-CS 6010A-CNIC is a steel continuous stringer/multi-beam or girder carrying I 57 NB over ILL3/US 51-CS 6010A-CNIC in Alexander County, Illinois. It was built in 1978, so it is 47 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 5 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 7,500 vehicles a day, roughly 49% of them trucks, projected to reach 6,818 by 2046. The structure is 3,017 ft (919.5 m) long and 42 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesI 57 NB
CrossesILL3/US 51-CS 6010A-CNIC
LocationCairo Interchange
RouteInterstate 57
CountyAlexander County
StateIllinois
Coordinates37.03426, -89.20368
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.
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 inspectionMarch 2024
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans30
Design loadHS 20 + Mod
Structure length3,017 ft (919.5 m)
Longest span150 ft (45.7 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2024)
Projected traffic6,818 by 2046
Trucks49%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed8.7 mi (14 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 over ILL3/US 51-CS 6010A-CNIC built?

It was built in 1978, making it 47 years old in 2025.

What condition is I 57 NB over ILL3/US 51-CS 6010A-CNIC 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 March 2024.

How much traffic does I 57 NB over ILL3/US 51-CS 6010A-CNIC carry?

About 7,500 vehicles per day (2024 count), of which roughly 49% are trucks.

How long is I 57 NB over ILL3/US 51-CS 6010A-CNIC?

The structure is 3,017 ft (919.5 m) long with a longest span of 150 ft (45.7 m) and a deck 42 ft wide.

Who owns I 57 NB over ILL3/US 51-CS 6010A-CNIC?

It is owned by the State Highway Agency.