US Bridges

US 20 W B over Il RR

Fair

Winnebago County, Illinois · .5 MI W of Ill 251 · Structure no. 101006400000000

Built
1960
65 years old, rebuilt 2002
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
163 ft
3 main spans
Daily traffic
32,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 W B over Il RR is a steel continuous stringer/multi-beam or girder carrying US 20 W B over Il RR in Winnebago County, Illinois. It was built in 1960 and reconstructed in 2002, so it is 65 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 32,000 vehicles a day, roughly 12% of them trucks, projected to reach 15,605 by 2046. The structure is 163 ft (49.7 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20 W B
CrossesIl RR
Location.5 MI W of Ill 251
RouteU.S. Route 20
CountyWinnebago County
StateIllinois
Coordinates42.21943, -89.08162
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 inspectionFebruary 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length163 ft (49.7 m)
Longest span62 ft (18.9 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,000 (2023)
Projected traffic15,605 by 2046
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 W B over Il RR built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2002.

What condition is US 20 W B over Il RR 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 US 20 W B over Il RR carry?

About 32,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 20 W B over Il RR?

The structure is 163 ft (49.7 m) long with a longest span of 62 ft (18.9 m) and a deck 36 ft wide.

Who owns US 20 W B over Il RR?

It is owned by the State Highway Agency.