US Bridges

Fdr 524-01 over N. Yuba River

Fair

Sierra County, California · S27 T20N R12E · Structure no. 051753000001029

Built
1963
62 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Concrete Continuous
Length
150 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 524-01 over N. Yuba River is a concrete continuous girder and floorbeam system carrying Fdr 524-01 over N. Yuba River in Sierra County, California. It was built in 1963, so it is 62 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 150 ft (45.8 m) long and 14 ft wide.

Location

Open in Google Maps
CarriesFdr 524-01
CrossesN. Yuba River
LocationS27 T20N R12E
RouteCounty Highway SIE-0
CountySierra County
StateCalifornia
Coordinates39.56854, -120.61537
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.8 m)
Longest span62 ft (18.9 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 524-01 over N. Yuba River built?

It was built in 1963, making it 62 years old in 2025.

What condition is Fdr 524-01 over N. Yuba River 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 September 2024.

How much traffic does Fdr 524-01 over N. Yuba River carry?

About 50 vehicles per day (latest count).

How long is Fdr 524-01 over N. Yuba River?

The structure is 150 ft (45.8 m) long with a longest span of 62 ft (18.9 m) and a deck 14 ft wide.

Who owns Fdr 524-01 over N. Yuba River?

It is owned by the U.S. Forest Service.