US Bridges

US 20 EB over S Appleton RD

Fair

Boone County, Illinois · SW Edge Belvidere · Structure no. 004000500000000

Built
1966
59 years old, rebuilt 2000
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
291 ft
6 main spans
Daily traffic
13,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 EB over S Appleton RD is a steel continuous stringer/multi-beam or girder carrying US 20 EB over S Appleton RD in Boone County, Illinois. It was built in 1966 and reconstructed in 2000, so it is 59 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 13,100 vehicles a day, roughly 12% of them trucks, projected to reach 6,656 by 2046. The structure is 291 ft (88.8 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20 EB
CrossesS Appleton RD
LocationSW Edge Belvidere
RouteU.S. Route 20
CountyBoone County
StateIllinois
Coordinates42.24026, -88.86152
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.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.9 US tons
Inventory rating56.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length291 ft (88.8 m)
Longest span59 ft (18.1 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,100 (2023)
Projected traffic6,656 by 2046
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 EB over S Appleton RD built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2000.

What condition is US 20 EB over S Appleton RD 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 January 2025.

How much traffic does US 20 EB over S Appleton RD carry?

About 13,100 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 20 EB over S Appleton RD?

The structure is 291 ft (88.8 m) long with a longest span of 59 ft (18.1 m) and a deck 38 ft wide.

Who owns US 20 EB over S Appleton RD?

It is owned by the State Highway Agency.