US Bridges

Interstate 80 WB over Troy Road

Fair

Placer County, California · 03-PLA-080-68.55 · Structure no. 19 0106L

Built
1959
66 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
13,500
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 80 WB over Troy Road is a concrete continuous tee beam carrying Interstate 80 WB over Troy Road in Placer County, California. It was built in 1959, so it is 66 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 13,500 vehicles a day, roughly 10% of them trucks, projected to reach 20,403 by 2046. The structure is 101 ft (30.8 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 80 WB
CrossesTroy Road
Location03-PLA-080-68.55
RouteInterstate 80
Coordinates39.31537, -120.45813
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length101 ft (30.8 m)
Longest span40 ft (12.2 m)
Deck width47 ft (14.3 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2015)
Projected traffic20,403 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 WB over Troy Road built?

It was built in 1959, making it 66 years old in 2025.

What condition is Interstate 80 WB over Troy Road 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 June 2024.

How much traffic does Interstate 80 WB over Troy Road carry?

About 13,500 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Interstate 80 WB over Troy Road?

The structure is 101 ft (30.8 m) long with a longest span of 40 ft (12.2 m) and a deck 47 ft wide.

Who owns Interstate 80 WB over Troy Road?

It is owned by the State Highway Agency.