US Bridges

WB I-74 over Il 17 & Bnsf-Exempt

Poor

Knox County, Illinois · 0.5 MI W of Woodhull · Structure no. 037002000000000

Built
1967
58 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
4 main spans
Daily traffic
7,500
2021 count
Owner
State
State Highway Agency

About this bridge

WB I-74 over Il 17 & Bnsf-Exempt is a steel continuous stringer/multi-beam or girder carrying WB I-74 over Il 17 & Bnsf-Exempt in Knox 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,500 vehicles a day, roughly 32% of them trucks, projected to reach 8,100 by 2046. The structure is 248 ft (75.6 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWB I-74
CrossesIl 17 & Bnsf-Exempt
Location0.5 MI W of Woodhull
RouteInterstate 74
CountyKnox County
StateIllinois
Coordinates41.18041, -90.33257
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.4 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length248 ft (75.6 m)
Longest span68 ft (20.7 m)
Deck width49 ft (14.9 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2021)
Projected traffic8,100 by 2046
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was WB I-74 over Il 17 & Bnsf-Exempt built?

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

What condition is WB I-74 over Il 17 & Bnsf-Exempt in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does WB I-74 over Il 17 & Bnsf-Exempt carry?

About 7,500 vehicles per day (2021 count), of which roughly 32% are trucks.

How long is WB I-74 over Il 17 & Bnsf-Exempt?

The structure is 248 ft (75.6 m) long with a longest span of 68 ft (20.7 m) and a deck 49 ft wide.

Who owns WB I-74 over Il 17 & Bnsf-Exempt?

It is owned by the State Highway Agency.