US Bridges

Interstate 5 SB over UP RR & AMTRAK

Good

Siskiyou County, California · 02-SIS-005-R15.94 · Structure no. 02 0204L

Built
2021
4 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
3 main spans
Daily traffic
12,750
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 SB over UP RR & AMTRAK is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 5 SB over UP RR & AMTRAK in Siskiyou County, California. It was built in 2021, so it is 4 years old, younger 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 12,750 vehicles a day, roughly 27% of them trucks, projected to reach 16,575 by 2045. The structure is 230 ft (70 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesInterstate 5 SB
CrossesUP RR & AMTRAK
Location02-SIS-005-R15.94
RouteInterstate 5
Coordinates41.37553, -122.37547
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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length230 ft (70 m)
Longest span107 ft (32.6 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,750 (2019)
Projected traffic16,575 by 2045
Trucks27%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 5 SB over UP RR & AMTRAK built?

It was built in 2021, making it 4 years old in 2025.

What condition is Interstate 5 SB over 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 SB over UP RR & AMTRAK carry?

About 12,750 vehicles per day (2019 count), of which roughly 27% are trucks.

How long is Interstate 5 SB over UP RR & AMTRAK?

The structure is 230 ft (70 m) long with a longest span of 107 ft (32.6 m) and a deck 43 ft wide.

Who owns Interstate 5 SB over UP RR & AMTRAK?

It is owned by the State Highway Agency.