US Bridges

Il 23 NB in Streat over Inter Stream

Fair

LaSalle County, Illinois · 14.30 MI S of Ill 71 · Structure no. 050005100000000

Built
1965
60 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
40 ft
1 main span
Daily traffic
8,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 23 NB in Streat over Inter Stream is a concrete slab carrying Il 23 NB in Streat over Inter Stream in LaSalle County, Illinois. It was built in 1965, so it is 60 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 8,000 vehicles a day, roughly 5% of them trucks, projected to reach 8,181 by 2046. The structure is 40 ft (12.2 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIl 23 NB in Streat
CrossesInter Stream
Location14.30 MI S of Ill 71
RouteState Highway 23
CountyLaSalle County
StateIllinois
Coordinates41.13407, -88.83498
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
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 alignment6: Equal to present minimum criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width39 ft (12 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2023)
Projected traffic8,181 by 2046
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Il 23 NB in Streat over Inter Stream built?

It was built in 1965, making it 60 years old in 2025.

What condition is Il 23 NB in Streat over Inter Stream 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 February 2024.

How much traffic does Il 23 NB in Streat over Inter Stream carry?

About 8,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Il 23 NB in Streat over Inter Stream?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 39 ft wide.

Who owns Il 23 NB in Streat over Inter Stream?

It is owned by the State Highway Agency.