US Bridges

I-57(SB) over 2 Mile Slough

Fair

Champaign County, Illinois · W of Tolono · Structure no. 010000400000000

Built
1963
62 years old, rebuilt 2003
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
11,550
2023 count
Owner
State
State Highway Agency

About this bridge

I-57(SB) over 2 Mile Slough is a concrete slab carrying I-57(SB) over 2 Mile Slough in Champaign County, Illinois. It was built in 1963 and reconstructed in 2003, so it is 62 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 11,550 vehicles a day, roughly 39% of them trucks, projected to reach 13,029 by 2046. The structure is 25 ft (7.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-57(SB)
Crosses2 Mile Slough
LocationW of Tolono
RouteInterstate 57
CountyChampaign County
StateIllinois
Coordinates39.98627, -88.30348
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span24 ft (7.2 m)
Deck width44 ft (13.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,550 (2023)
Projected traffic13,029 by 2046
Trucks39%
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 2 Mile Slough built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2003.

What condition is I-57(SB) over 2 Mile Slough 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 August 2024.

How much traffic does I-57(SB) over 2 Mile Slough carry?

About 11,550 vehicles per day (2023 count), of which roughly 39% are trucks.

How long is I-57(SB) over 2 Mile Slough?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.2 m) and a deck 44 ft wide.

Who owns I-57(SB) over 2 Mile Slough?

It is owned by the State Highway Agency.