US Bridges

Road 23N08 over Poplar Creek

Good

Plumas County, California · Poplar Creek · Structure no. 051151000001024

Built
1966
59 years old, rebuilt 1988
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
59 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road 23N08 over Poplar Creek is a concrete slab carrying Road 23N08 over Poplar Creek in Plumas County, California. It was built in 1966 and reconstructed in 1988, so it is 59 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 59 ft (18.1 m) long and 16 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

CarriesRoad 23N08
CrossesPoplar Creek
LocationPoplar Creek
RouteFederal Lands Road 23N08
Coordinates39.8489, -120.72794
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.3 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length59 ft (18.1 m)
Longest span28 ft (8.4 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 23N08 over Poplar Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1988.

What condition is Road 23N08 over Poplar Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Road 23N08 over Poplar Creek carry?

About 50 vehicles per day (latest count).

How long is Road 23N08 over Poplar Creek?

The structure is 59 ft (18.1 m) long with a longest span of 28 ft (8.4 m) and a deck 16 ft wide.

Who owns Road 23N08 over Poplar Creek?

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