US Bridges

Dyson Lane over Mid Fk Feather Riv Ovrfl

Fair

Plumas County, California · 1.95 MI E Bckwth-Clpin RD · Structure no. 09C0077

Built
1959
66 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
21 ft
1 main span
Daily traffic
45
2019 count
Owner
County
County Highway Agency

About this bridge

Dyson Lane over Mid Fk Feather Riv Ovrfl is a concrete stringer/multi-beam or girder carrying Dyson Lane over Mid Fk Feather Riv Ovrfl in Plumas County, California. It was built in 1959, so it is 66 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 45 vehicles a day, projected to reach 79 by 2044. The structure is 21 ft (6.4 m) long and 16 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesDyson Lane
CrossesMid Fk Feather Riv Ovrfl
Location1.95 MI E Bckwth-Clpin RD
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.76279, -120.34388
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span19 ft (5.9 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2019)
Projected traffic79 by 2044
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Dyson Lane over Mid Fk Feather Riv Ovrfl built?

It was built in 1959, making it 66 years old in 2025.

What condition is Dyson Lane over Mid Fk Feather Riv Ovrfl 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 Dyson Lane over Mid Fk Feather Riv Ovrfl carry?

About 45 vehicles per day (2019 count).

How long is Dyson Lane over Mid Fk Feather Riv Ovrfl?

The structure is 21 ft (6.4 m) long with a longest span of 19 ft (5.9 m) and a deck 16 ft wide.

Who owns Dyson Lane over Mid Fk Feather Riv Ovrfl?

It is owned by the County Highway Agency.