US Bridges

SB Ill 6 over WB I-74

Fair

Peoria County, Illinois · 2 MI W Sterling Ave · Structure no. 072010600000000

Built
1978
47 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
174 ft
1 main span
Daily traffic
28,400
2023 count
Owner
State
State Highway Agency

About this bridge

SB Ill 6 over WB I-74 is a steel stringer/multi-beam or girder carrying SB Ill 6 over WB I-74 in Peoria 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 28,400 vehicles a day, roughly 7% of them trucks, projected to reach 13,989 by 2046. The structure is 174 ft (53 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB Ill 6
CrossesWB I-74
Location2 MI W Sterling Ave
RouteState Highway 6
CountyPeoria County
StateIllinois
Coordinates40.74241, -89.66772
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
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 inspectionDecember 2022
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length174 ft (53 m)
Longest span109 ft (33.2 m)
Deck width55 ft (16.8 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,400 (2023)
Projected traffic13,989 by 2046
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SB Ill 6 over WB I-74 built?

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

What condition is SB Ill 6 over WB I-74 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 December 2022.

How much traffic does SB Ill 6 over WB I-74 carry?

About 28,400 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SB Ill 6 over WB I-74?

The structure is 174 ft (53 m) long with a longest span of 109 ft (33.2 m) and a deck 55 ft wide.

Who owns SB Ill 6 over WB I-74?

It is owned by the State Highway Agency.