US Bridges

Road 23N10 over Poplar Creek

Fair

Plumas County, California · Poplar Creek near Sloat · Structure no. 051151000001025

Built
1975
50 years old, rebuilt 1988
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
56 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road 23N10 over Poplar Creek is a concrete slab carrying Road 23N10 over Poplar Creek in Plumas County, California. It was built in 1975 and reconstructed in 1988, so it is 50 years old, younger 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 6 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 56 ft (17.2 m) long and 15 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesRoad 23N10
CrossesPoplar Creek
LocationPoplar Creek near Sloat
RouteFederal Lands Road 23N10
CountyPlumas County
StateCalifornia
Coordinates39.85849, -120.72994
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating—
Inventory rating—

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span52 ft (15.7 m)
Deck width15 ft (4.6 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 23N10 over Poplar Creek built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1988.

What condition is Road 23N10 over Poplar Creek 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 Road 23N10 over Poplar Creek carry?

About 50 vehicles per day (latest count).

How long is Road 23N10 over Poplar Creek?

The structure is 56 ft (17.2 m) long with a longest span of 52 ft (15.7 m) and a deck 15 ft wide.

Who owns Road 23N10 over Poplar Creek?

It is owned by the U.S. Forest Service.