US Bridges

US 6 over Intermittent Stream

Fair

LaSalle County, Illinois · 2.86 MI E of Ill 71 · Structure no. 050010900000000

Built
1958
67 years old, rebuilt 1970
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
58 ft
2 main spans
Daily traffic
4,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 over Intermittent Stream is a concrete continuous slab carrying US 6 over Intermittent Stream in LaSalle County, Illinois. It was built in 1958 and reconstructed in 1970, so it is 67 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 4,050 vehicles a day, roughly 6% of them trucks, projected to reach 3,737 by 2046. The structure is 58 ft (17.6 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 6
CrossesIntermittent Stream
Location2.86 MI E of Ill 71
RouteU.S. Route 6
CountyLaSalle County
StateIllinois
Coordinates41.34299, -88.75104
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
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 rating53.6 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length58 ft (17.6 m)
Longest span27 ft (8.1 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2023)
Projected traffic3,737 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 US 6 over Intermittent Stream built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1970.

What condition is US 6 over Intermittent 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 March 2023.

How much traffic does US 6 over Intermittent Stream carry?

About 4,050 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 6 over Intermittent Stream?

The structure is 58 ft (17.6 m) long with a longest span of 27 ft (8.1 m) and a deck 47 ft wide.

Who owns US 6 over Intermittent Stream?

It is owned by the State Highway Agency.