US Bridges

Beckworth Calpine over Middle Fork Feather Riv

Fair

Plumas County, California · 0.2 MI South of SH 70 · Structure no. 09C0002

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
403 ft
6 main spans
Daily traffic
1,090
2019 count
Owner
County
County Highway Agency

About this bridge

Beckworth Calpine over Middle Fork Feather Riv is a steel stringer/multi-beam or girder carrying Beckworth Calpine over Middle Fork Feather Riv in Plumas County, California. It was built in 1961, so it is 64 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 1,090 vehicles a day, roughly 10% of them trucks, projected to reach 838 by 2044. The structure is 403 ft (122.8 m) long and 31 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesBeckworth Calpine
CrossesMiddle Fork Feather Riv
Location0.2 MI South of SH 70
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.81846, -120.39132
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating53.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length403 ft (122.8 m)
Longest span66 ft (20.1 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,090 (2019)
Projected traffic838 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 Beckworth Calpine over Middle Fork Feather Riv built?

It was built in 1961, making it 64 years old in 2025.

What condition is Beckworth Calpine over Middle Fork Feather Riv 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 Beckworth Calpine over Middle Fork Feather Riv carry?

About 1,090 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Beckworth Calpine over Middle Fork Feather Riv?

The structure is 403 ft (122.8 m) long with a longest span of 66 ft (20.1 m) and a deck 31 ft wide.

Who owns Beckworth Calpine over Middle Fork Feather Riv?

It is owned by the County Highway Agency.