US Bridges

Interstate 5 over Stewart Springs Road

Good

Siskiyou County, California · 02-SIS-005-R23.00 · Structure no. 02 0136L

Built
1969
56 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
87 ft
1 main span
Daily traffic
7,400
2024 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Stewart Springs Road is a prestressed concrete box beam or girders - multiple carrying Interstate 5 over Stewart Springs Road in Siskiyou County, California. It was built in 1969, so it is 56 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 7,400 vehicles a day, roughly 25% of them trucks, projected to reach 11,259 by 2045. The structure is 87 ft (26.5 m) long and 41 ft wide.

CarriesInterstate 5
CrossesStewart Springs Road
Location02-SIS-005-R23.00
RouteInterstate 5
Coordinates41.44185, -122.43515
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating29.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length87 ft (26.5 m)
Longest span85 ft (25.9 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,400 (2024)
Projected traffic11,259 by 2045
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 over Stewart Springs Road built?

It was built in 1969, making it 56 years old in 2025.

What condition is Interstate 5 over Stewart Springs Road 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 Stewart Springs Road carry?

About 7,400 vehicles per day (2024 count), of which roughly 25% are trucks.

How long is Interstate 5 over Stewart Springs Road?

The structure is 87 ft (26.5 m) long with a longest span of 85 ft (25.9 m) and a deck 41 ft wide.

Who owns Interstate 5 over Stewart Springs Road?

It is owned by the State Highway Agency.