US Bridges

Bair Road over Redwood Creek

Fair

Humboldt County, California · 3.4 MI N/O SR 299 · Structure no. 04C0116

Built
1950
75 years old, rebuilt 1967
Condition
Fair
inspected June 2023
Type
Truss - Thru
Steel
Length
144 ft
1 main span
Daily traffic
113
2006 count
Owner
County
County Highway Agency

About this bridge

Bair Road over Redwood Creek is a steel truss - thru carrying Bair Road over Redwood Creek in Humboldt County, California. It was built in 1950 and reconstructed in 1967, so it is 75 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 113 vehicles a day, roughly 1% of them trucks, projected to reach 437 by 2041. The structure is 144 ft (43.9 m) long and 23 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

Location

Open in Google Maps
CarriesBair Road
CrossesRedwood Creek
Location3.4 MI N/O SR 299
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.96364, -123.84048
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating33.6 US tons
Inventory rating20 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length144 ft (43.9 m)
Longest span100 ft (30.5 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2006)
Projected traffic437 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.2 mi (76 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bair Road over Redwood Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1967.

What condition is Bair Road over Redwood 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 June 2023.

How much traffic does Bair Road over Redwood Creek carry?

About 113 vehicles per day (2006 count), of which roughly 1% are trucks.

How long is Bair Road over Redwood Creek?

The structure is 144 ft (43.9 m) long with a longest span of 100 ft (30.5 m) and a deck 23 ft wide.

Who owns Bair Road over Redwood Creek?

It is owned by the County Highway Agency.