US Bridges

20th ST over US 20

Good

Winnebago County, Illinois · 0.7 MI E of Ill 251 · Structure no. 101018800000000

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
2 main spans
Daily traffic
3,750
2022 count
Owner
State
State Highway Agency

About this bridge

20th ST over US 20 is a steel continuous stringer/multi-beam or girder carrying 20th ST over US 20 in Winnebago County, Illinois. It was built in 2021, so it is 4 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,750 vehicles a day, roughly 5% of them trucks, projected to reach 4,545 by 2046. The structure is 212 ft (64.6 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries20th ST
CrossesUS 20
Location0.7 MI E of Ill 251
CountyWinnebago County
StateIllinois
Coordinates42.21953, -89.05755
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating65.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length212 ft (64.6 m)
Longest span109 ft (33.2 m)
Deck width46 ft (14.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2022)
Projected traffic4,545 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 20th ST over US 20 built?

It was built in 2021, making it 4 years old in 2025.

What condition is 20th ST over US 20 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does 20th ST over US 20 carry?

About 3,750 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 20th ST over US 20?

The structure is 212 ft (64.6 m) long with a longest span of 109 ft (33.2 m) and a deck 46 ft wide.

Who owns 20th ST over US 20?

It is owned by the State Highway Agency.