US Bridges

No Data Entered over No Data Entered

Good

Humboldt County, California · S15 T6N R4E · Structure no. 051053000001009

Built
1974
51 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
122 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

No Data Entered over No Data Entered is a concrete slab carrying No Data Entered over No Data Entered in Humboldt County, California. It was built in 1974, so it is 51 years old, younger 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 122 ft (37.2 m) long and 14 ft wide.

Location

Open in Google Maps
CarriesNo Data Entered
CrossesNo Data Entered
LocationS15 T6N R4E
RouteFederal Lands Road 6N21
CountyHumboldt County
StateCalifornia
Coordinates40.9065, -123.70711
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 protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionOctober 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 adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating—
Inventory rating—

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span122 ft (37.2 m)
Deck width14 ft (4.3 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 closed—
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 No Data Entered over No Data Entered built?

It was built in 1974, making it 51 years old in 2025.

What condition is No Data Entered over No Data Entered 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 October 2024.

How much traffic does No Data Entered over No Data Entered carry?

About 50 vehicles per day (latest count).

How long is No Data Entered over No Data Entered?

The structure is 122 ft (37.2 m) long with a longest span of 122 ft (37.2 m) and a deck 14 ft wide.

Who owns No Data Entered over No Data Entered?

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