US Bridges

Interstate 5 over Sacramento UP RR AMTRAK

Good

Siskiyou County, California · 02-SIS-005-2.65-DMR · Structure no. 02 0002

Built
1955
70 years old, rebuilt 1983
Condition
Good
inspected July 2024
Type
Arch - Deck
Concrete
Length
579 ft
3 main spans
Daily traffic
18,000
2024 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Sacramento UP RR AMTRAK is a concrete arch - deck carrying Interstate 5 over Sacramento UP RR AMTRAK in Siskiyou County, California. It was built in 1955 and reconstructed in 1983, so it is 70 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 18,000 vehicles a day, roughly 28% of them trucks, projected to reach 26,101 by 2045. The structure is 579 ft (176.5 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesSacramento UP RR AMTRAK
Location02-SIS-005-2.65-DMR
RouteInterstate 5
Coordinates41.21973, -122.2748
Functional classRural Principal Arterial - Interstate

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 inspectionJuly 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating23.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20
Structure length579 ft (176.5 m)
Longest span191 ft (58.1 m)
Deck width89 ft (27 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2024)
Projected traffic26,101 by 2045
Trucks28%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 5 over Sacramento UP RR AMTRAK built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1983.

What condition is Interstate 5 over Sacramento UP RR AMTRAK 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 July 2024.

How much traffic does Interstate 5 over Sacramento UP RR AMTRAK carry?

About 18,000 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is Interstate 5 over Sacramento UP RR AMTRAK?

The structure is 579 ft (176.5 m) long with a longest span of 191 ft (58.1 m) and a deck 89 ft wide.

Who owns Interstate 5 over Sacramento UP RR AMTRAK?

It is owned by the State Highway Agency.