US Bridges

Sloat-Poplar Vly R over Middle Fork Feather Riv

Fair

Plumas County, California · At Sloat RD · Structure no. 09C0149

Built
1959
66 years old
Condition
Fair
inspected October 2023
Type
Truss - Deck
Steel
Length
248 ft
2 main spans
Daily traffic
140
2019 count
Owner
County
County Highway Agency

About this bridge

Sloat-Poplar Vly R over Middle Fork Feather Riv is a steel truss - deck carrying Sloat-Poplar Vly R over Middle Fork Feather Riv 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 140 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2044. The structure is 248 ft (75.6 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSloat-Poplar Vly R
CrossesMiddle Fork Feather Riv
LocationAt Sloat RD
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.86007, -120.72791
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.
Superstructure7 GoodSome minor problems.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment6: Equal to present minimum criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadHS 20
Structure length248 ft (75.6 m)
Longest span111 ft (33.8 m)
Deck width23 ft (6.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2019)
Projected traffic160 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Sloat-Poplar Vly R over Middle Fork Feather Riv built?

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

What condition is Sloat-Poplar Vly R 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 Sloat-Poplar Vly R over Middle Fork Feather Riv carry?

About 140 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Sloat-Poplar Vly R over Middle Fork Feather Riv?

The structure is 248 ft (75.6 m) long with a longest span of 111 ft (33.8 m) and a deck 23 ft wide.

Who owns Sloat-Poplar Vly R over Middle Fork Feather Riv?

It is owned by the County Highway Agency.