US Bridges

Road 22N57 over Lower Kenzie Ravine

Good

Plumas County, California · No Data Entered · Structure no. 051153000001071

Built
1960
65 years old, rebuilt 2000
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
36 ft
1 main span
Daily traffic
40
1980 count
Owner
Federal
U.S. Forest Service

About this bridge

Road 22N57 over Lower Kenzie Ravine is a wood or timber stringer/multi-beam or girder carrying Road 22N57 over Lower Kenzie Ravine in Plumas County, California. It was built in 1960 and reconstructed in 2000, so it is 65 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 36 ft (11 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesRoad 22N57
CrossesLower Kenzie Ravine
LocationNo Data Entered
RouteFederal Lands Road 22N57
Coordinates39.73289, -120.96645
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating—
Inventory rating—

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (1980)
Projected traffic60 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 22N57 over Lower Kenzie Ravine built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2000.

What condition is Road 22N57 over Lower Kenzie Ravine 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 2024.

How much traffic does Road 22N57 over Lower Kenzie Ravine carry?

About 40 vehicles per day (1980 count).

How long is Road 22N57 over Lower Kenzie Ravine?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 25 ft wide.

Who owns Road 22N57 over Lower Kenzie Ravine?

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