US Bridges

South Fork over So. Fk. Sacramento River

Good

Siskiyou County, California · No Data Entered · Structure no. 051459000001045

Built
1966
59 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Concrete
Length
132 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

South Fork over So. Fk. Sacramento River is a concrete tee beam carrying South Fork over So. Fk. Sacramento River in Siskiyou County, California. It was built in 1966, so it is 59 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 132 ft (40.1 m) long and 27 ft wide.

CarriesSouth Fork
CrossesSo. Fk. Sacramento River
LocationNo Data Entered
RouteFederal Lands Road 40N26
Coordinates41.2704, -122.4093
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 protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length132 ft (40.1 m)
Longest span65 ft (19.8 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-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 South Fork over So. Fk. Sacramento River built?

It was built in 1966, making it 59 years old in 2025.

What condition is South Fork over So. Fk. Sacramento 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 April 2024.

How much traffic does South Fork over So. Fk. Sacramento River carry?

About 50 vehicles per day (latest count).

How long is South Fork over So. Fk. Sacramento River?

The structure is 132 ft (40.1 m) long with a longest span of 65 ft (19.8 m) and a deck 27 ft wide.

Who owns South Fork over So. Fk. Sacramento River?

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