US Bridges

Interstate 80 over Cape Horn Road

Good

Placer County, California · 03-PLA-080-36.86 · Structure no. 19 0206

Built
2019
6 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
29,800
2017 count
Owner
State
State Highway Agency

About this bridge

Interstate 80 over Cape Horn Road is a prestressed concrete stringer/multi-beam or girder carrying Interstate 80 over Cape Horn Road in Placer County, California. It was built in 2019, so it is 6 years old, younger than the California average of 54.8 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 29,800 vehicles a day, roughly 19% of them trucks, projected to reach 34,000 by 2041. The structure is 66 ft (20.1 m) long and 100 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesInterstate 80
CrossesCape Horn Road
Location03-PLA-080-36.86
RouteInterstate 80
Coordinates39.13847, -120.91975
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length66 ft (20.1 m)
Longest span63 ft (19.2 m)
Deck width100 ft (30.4 m)
Roadway width95 ft (29 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,800 (2017)
Projected traffic34,000 by 2041
Trucks19%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 80 over Cape Horn Road built?

It was built in 2019, making it 6 years old in 2025.

What condition is Interstate 80 over Cape Horn Road 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 June 2023.

How much traffic does Interstate 80 over Cape Horn Road carry?

About 29,800 vehicles per day (2017 count), of which roughly 19% are trucks.

How long is Interstate 80 over Cape Horn Road?

The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 100 ft wide.

Who owns Interstate 80 over Cape Horn Road?

It is owned by the State Highway Agency.