US Bridges

US 20 EB over Wickham Creek

Fair

Stephenson County, Illinois · 4 MI W. Winnebago CO · Structure no. 089007900000000

Built
1999
26 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
12,700
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 EB over Wickham Creek is a prestressed concrete stringer/multi-beam or girder carrying US 20 EB over Wickham Creek in Stephenson County, Illinois. It was built in 1999, so it is 26 years old, younger 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 12,700 vehicles a day, roughly 16% of them trucks, projected to reach 7,020 by 2046. The structure is 52 ft (15.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20 EB
CrossesWickham Creek
Location4 MI W. Winnebago CO
RouteU.S. Route 20
CountyStephenson County
StateIllinois
Coordinates42.27503, -89.46794
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span49 ft (15 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,700 (2023)
Projected traffic7,020 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20 EB over Wickham Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is US 20 EB over Wickham Creek 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 November 2022.

How much traffic does US 20 EB over Wickham Creek carry?

About 12,700 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 20 EB over Wickham Creek?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (15 m) and a deck 43 ft wide.

Who owns US 20 EB over Wickham Creek?

It is owned by the State Highway Agency.