US Bridges

State Route 254 over South Fork Eel River

Good

Humboldt County, California · 01-HUM-254-20.64 · Structure no. 04 0010

Built
1931
94 years old, rebuilt 1966
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
634 ft
1 main span
Daily traffic
460
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 254 over South Fork Eel River is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 254 over South Fork Eel River in Humboldt County, California. It was built in 1931 and reconstructed in 1966, so it is 94 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 460 vehicles a day, roughly 11% of them trucks, projected to reach 428 by 2041. The structure is 634 ft (193.2 m) long and 31 ft wide. If it were closed, the detour would be 75.2 mi (121 km).

CarriesState Route 254
CrossesSouth Fork Eel River
Location01-HUM-254-20.64
RouteState Highway 254
Coordinates40.35337, -123.92577
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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating34.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+6 approach)
Design loadHS 20
Structure length634 ft (193.2 m)
Longest span200 ft (61 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2014)
Projected traffic428 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed75.2 mi (121 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 254 over South Fork Eel River built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1966.

What condition is State Route 254 over South Fork Eel River 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 August 2024.

How much traffic does State Route 254 over South Fork Eel River carry?

About 460 vehicles per day (2014 count), of which roughly 11% are trucks.

How long is State Route 254 over South Fork Eel River?

The structure is 634 ft (193.2 m) long with a longest span of 200 ft (61 m) and a deck 31 ft wide.

Who owns State Route 254 over South Fork Eel River?

It is owned by the State Highway Agency.