US Bridges

I 57 SB over Cache River

Fair

Alexander County, Illinois · Pulaski CO Line · Structure no. 002000400000000

Built
1967
58 years old
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
714 ft
3 main spans
Daily traffic
6,100
2024 count
Owner
State
State Highway Agency

About this bridge

I 57 SB over Cache River is a steel continuous girder and floorbeam system carrying I 57 SB over Cache River in Alexander County, Illinois. It was built in 1967, so it is 58 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 6,100 vehicles a day, roughly 55% of them trucks, projected to reach 6,767 by 2046. The structure is 714 ft (217.6 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 57 SB
CrossesCache River
LocationPulaski CO Line
RouteInterstate 57
CountyAlexander County
StateIllinois
Coordinates37.08016, -89.18833
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHS 20 + Mod
Structure length714 ft (217.6 m)
Longest span186 ft (56.7 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2024)
Projected traffic6,767 by 2046
Trucks55%
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 I 57 SB over Cache River built?

It was built in 1967, making it 58 years old in 2025.

What condition is I 57 SB over Cache River 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 2023.

How much traffic does I 57 SB over Cache River carry?

About 6,100 vehicles per day (2024 count), of which roughly 55% are trucks.

How long is I 57 SB over Cache River?

The structure is 714 ft (217.6 m) long with a longest span of 186 ft (56.7 m) and a deck 36 ft wide.

Who owns I 57 SB over Cache River?

It is owned by the State Highway Agency.