US Bridges

US Route 20 over Yellow Creek Trib

Good

Jo Daviess County, Illinois · 1.3 MI E JCT Il 78 · Structure no. 043200600000000

Built
2005
20 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
5,650
2023 count
Owner
State
State Highway Agency

About this bridge

US Route 20 over Yellow Creek Trib is a concrete culvert carrying US Route 20 over Yellow Creek Trib in Jo Daviess County, Illinois. It was built in 2005, so it is 20 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 5,650 vehicles a day, roughly 18% of them trucks, projected to reach 6,363 by 2046. The structure is 34 ft (10.5 m) long and 50 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

CarriesUS Route 20
CrossesYellow Creek Trib
Location1.3 MI E JCT Il 78
RouteU.S. Route 20
Coordinates42.35669, -89.95637
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
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 rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length34 ft (10.5 m)
Longest span11 ft (3.4 m)
Deck width50 ft (15.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,650 (2023)
Projected traffic6,363 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 Route 20 over Yellow Creek Trib built?

It was built in 2005, making it 20 years old in 2025.

What condition is US Route 20 over Yellow Creek Trib 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 October 2023.

How much traffic does US Route 20 over Yellow Creek Trib carry?

About 5,650 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US Route 20 over Yellow Creek Trib?

The structure is 34 ft (10.5 m) long with a longest span of 11 ft (3.4 m) and a deck 50 ft wide.

Who owns US Route 20 over Yellow Creek Trib?

It is owned by the State Highway Agency.