US Bridges

Road 23N68 over So Fork Rock Creek

Fair

Plumas County, California · No Data Entered · Structure no. 051156000001004

Built
1966
59 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
48 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road 23N68 over So Fork Rock Creek is a wood or timber stringer/multi-beam or girder carrying Road 23N68 over So Fork Rock Creek in Plumas County, California. It was built in 1966, 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 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 48 ft (14.6 m) long and 16 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesRoad 23N68
CrossesSo Fork Rock Creek
LocationNo Data Entered
RouteFederal Lands Road 23N68
CountyPlumas County
StateCalifornia
Coordinates39.88671, -121.02267
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating—
Inventory rating—

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadOther
Structure length48 ft (14.6 m)
Longest span48 ft (14.6 m)
Deck width16 ft (4.8 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 closed39.8 mi (64 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 23N68 over So Fork Rock Creek built?

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

What condition is Road 23N68 over So Fork Rock 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 23N68 over So Fork Rock Creek carry?

About 50 vehicles per day (latest count).

How long is Road 23N68 over So Fork Rock Creek?

The structure is 48 ft (14.6 m) long with a longest span of 48 ft (14.6 m) and a deck 16 ft wide.

Who owns Road 23N68 over So Fork Rock Creek?

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