US Bridges

Clio-State 40A RD over Middle Fork Feather Riv

Fair

Plumas County, California · 0.1 Mile North of SR 89 · Structure no. 09C0057

Built
1953
72 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
203 ft
4 main spans
Daily traffic
570
2019 count
Owner
County
County Highway Agency

About this bridge

Clio-State 40A RD over Middle Fork Feather Riv is a steel stringer/multi-beam or girder carrying Clio-State 40A RD over Middle Fork Feather Riv in Plumas County, California. It was built in 1953, so it is 72 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 570 vehicles a day, roughly 2% of them trucks, projected to reach 1,257 by 2044. The structure is 203 ft (61.9 m) long and 21 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesClio-State 40A RD
CrossesMiddle Fork Feather Riv
Location0.1 Mile North of SR 89
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.74089, -120.58031
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length203 ft (61.9 m)
Longest span60 ft (18.3 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2019)
Projected traffic1,257 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Clio-State 40A RD over Middle Fork Feather Riv built?

It was built in 1953, making it 72 years old in 2025.

What condition is Clio-State 40A RD 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 October 2023.

How much traffic does Clio-State 40A RD over Middle Fork Feather Riv carry?

About 570 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Clio-State 40A RD over Middle Fork Feather Riv?

The structure is 203 ft (61.9 m) long with a longest span of 60 ft (18.3 m) and a deck 21 ft wide.

Who owns Clio-State 40A RD over Middle Fork Feather Riv?

It is owned by the County Highway Agency.