US Bridges

Fulmor Road over Salt River

Fair

Humboldt County, California · North of Kenyon Road · Structure no. 04C0029

Built
1950
75 years old, rebuilt 2011
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
407 ft
11 main spans
Daily traffic
246
2014 count
Owner
County
County Highway Agency

About this bridge

Fulmor Road over Salt River is a concrete continuous tee beam carrying Fulmor Road over Salt River in Humboldt County, California. It was built in 1950 and reconstructed in 2011, 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 6 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 246 vehicles a day, roughly 5% of them trucks, projected to reach 450 by 2041. The structure is 407 ft (124.1 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFulmor Road
CrossesSalt River
LocationNorth of Kenyon Road
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.59468, -124.25021
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11 (+11 approach)
Design loadUnknown
Structure length407 ft (124.1 m)
Longest span20 ft (6.1 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic246 (2014)
Projected traffic450 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Fulmor Road over Salt River built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2011.

What condition is Fulmor Road over Salt River 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 August 2024.

How much traffic does Fulmor Road over Salt River carry?

About 246 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Fulmor Road over Salt River?

The structure is 407 ft (124.1 m) long with a longest span of 20 ft (6.1 m) and a deck 23 ft wide.

Who owns Fulmor Road over Salt River?

It is owned by the County Highway Agency.