US Bridges

State Route 174 over Interstate 80

Fair

Placer County, California · 03-PLA-174-0.01-CFX · Structure no. 19 0086

Built
1958
67 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
2 main spans
Daily traffic
14,000
2013 count
Owner
State
State Highway Agency

About this bridge

State Route 174 over Interstate 80 is a steel stringer/multi-beam or girder carrying State Route 174 over Interstate 80 in Placer County, California. It was built in 1958, so it is 67 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 14,000 vehicles a day, roughly 2% of them trucks, projected to reach 21,424 by 2045. The structure is 127 ft (38.7 m) long and 38 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesState Route 174
CrossesInterstate 80
Location03-PLA-174-0.01-CFX
RouteState Highway 174
CountyPlacer County
StateCalifornia
Coordinates39.09581, -120.94975
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span67 ft (20.3 m)
Deck width38 ft (11.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2013)
Projected traffic21,424 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed9.9 mi (16 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 174 over Interstate 80 built?

It was built in 1958, making it 67 years old in 2025.

What condition is State Route 174 over Interstate 80 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 October 2023.

How much traffic does State Route 174 over Interstate 80 carry?

About 14,000 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is State Route 174 over Interstate 80?

The structure is 127 ft (38.7 m) long with a longest span of 67 ft (20.3 m) and a deck 38 ft wide.

Who owns State Route 174 over Interstate 80?

It is owned by the State Highway Agency.