US Bridges

Fieldbrook RD over Squaw Creek

Good

Humboldt County, California · 2.9 MI N/E of RTE 299 · Structure no. 04C0203

Built
1951
74 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
1,173
2008 count
Owner
County
County Highway Agency

About this bridge

Fieldbrook RD over Squaw Creek is a concrete slab carrying Fieldbrook RD over Squaw Creek in Humboldt County, California. It was built in 1951, so it is 74 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 1,173 vehicles a day, roughly 21% of them trucks, projected to reach 544 by 2041. The structure is 30 ft (9 m) long and 23 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesFieldbrook RD
CrossesSquaw Creek
Location2.9 MI N/E of RTE 299
RouteCounty Highway 0
Coordinates40.93977, -124.02338
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9 m)
Longest span28 ft (8.5 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,173 (2008)
Projected traffic544 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Fieldbrook RD over Squaw Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is Fieldbrook RD over Squaw Creek 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 2023.

How much traffic does Fieldbrook RD over Squaw Creek carry?

About 1,173 vehicles per day (2008 count), of which roughly 21% are trucks.

How long is Fieldbrook RD over Squaw Creek?

The structure is 30 ft (9 m) long with a longest span of 28 ft (8.5 m) and a deck 23 ft wide.

Who owns Fieldbrook RD over Squaw Creek?

It is owned by the County Highway Agency.