US Bridges

US 20 Wbl over County Line Road Ic

Good

Bonneville County, Idaho · 2.0 N.E. Ucon · Structure no. 000000000012414

Built
2001
24 years old
Condition
Good
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
126 ft
1 main span
Daily traffic
17,750
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Wbl over County Line Road Ic is a prestressed concrete stringer/multi-beam or girder carrying US 20 Wbl over County Line Road Ic in Bonneville County, Idaho. It was built in 2001, so it is 24 years old, younger than the Idaho 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 17,750 vehicles a day, roughly 6% of them trucks, projected to reach 26,625 by 2042. The structure is 126 ft (38.4 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesUS 20 Wbl
CrossesCounty Line Road Ic
Location2.0 N.E. Ucon
RouteU.S. Route 20
CountyBonneville County
StateIdaho
Coordinates43.62666, -111.94427
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length126 ft (38.4 m)
Longest span122 ft (37.2 m)
Deck width43 ft (13.2 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,750 (2023)
Projected traffic26,625 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 Wbl over County Line Road Ic built?

It was built in 2001, making it 24 years old in 2025.

What condition is US 20 Wbl over County Line Road Ic 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 September 2022.

How much traffic does US 20 Wbl over County Line Road Ic carry?

About 17,750 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 20 Wbl over County Line Road Ic?

The structure is 126 ft (38.4 m) long with a longest span of 122 ft (37.2 m) and a deck 43 ft wide.

Who owns US 20 Wbl over County Line Road Ic?

It is owned by the State Highway Agency.