US Bridges

1st Avenue over North Fork Feather River

Fair

Plumas County, California · 0.1 MI S of S.H. 36 · Structure no. 09C0137

Built
1947
78 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
960
2019 count
Owner
County
County Highway Agency

About this bridge

1st Avenue over North Fork Feather River is a concrete continuous slab carrying 1st Avenue over North Fork Feather River in Plumas County, California. It was built in 1947, so it is 78 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 960 vehicles a day, roughly 3% of them trucks, projected to reach 2,410 by 2044. The structure is 133 ft (40.5 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries1st Avenue
CrossesNorth Fork Feather River
Location0.1 MI S of S.H. 36
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates40.30984, -121.22702
Functional classRural Minor Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length133 ft (40.5 m)
Longest span53 ft (16.2 m)
Deck width33 ft (10 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic960 (2019)
Projected traffic2,410 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 1st Avenue over North Fork Feather River built?

It was built in 1947, making it 78 years old in 2025.

What condition is 1st Avenue over North Fork Feather 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 2023.

How much traffic does 1st Avenue over North Fork Feather River carry?

About 960 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is 1st Avenue over North Fork Feather River?

The structure is 133 ft (40.5 m) long with a longest span of 53 ft (16.2 m) and a deck 33 ft wide.

Who owns 1st Avenue over North Fork Feather River?

It is owned by the County Highway Agency.