US Bridges

4th ST over Auburn Ravine

Fair

Placer County, California · 400 Feet E of East Ave · Structure no. 19C0254

Built
1923
102 years old, rebuilt 1963
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
148 ft
5 main spans
Daily traffic
12,500
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th ST over Auburn Ravine is a concrete continuous tee beam carrying 4th ST over Auburn Ravine in Placer County, California. It was built in 1923 and reconstructed in 1963, so it is 102 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 6 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 12,500 vehicles a day, roughly 8% of them trucks, projected to reach 17,000 by 2040. The structure is 148 ft (45.1 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries4th ST
CrossesAuburn Ravine
Location400 Feet E of East Ave
RouteCity Street 0
CountyPlacer County
StateCalifornia
Coordinates38.89021, -121.28339
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length148 ft (45.1 m)
Longest span44 ft (13.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2019)
Projected traffic17,000 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 4th ST over Auburn Ravine built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1963.

What condition is 4th ST over Auburn Ravine 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 April 2023.

How much traffic does 4th ST over Auburn Ravine carry?

About 12,500 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is 4th ST over Auburn Ravine?

The structure is 148 ft (45.1 m) long with a longest span of 44 ft (13.4 m) and a deck 43 ft wide.

Who owns 4th ST over Auburn Ravine?

It is owned by the City or Municipal Highway Agency.