US Bridges

I-5 (hwy 001) SB over Or 273 (hwy 273)

Fair

Jackson County, Oregon · 5.4 MI N Ca State Line · Structure no. 09259 001 00536

Built
1965
60 years old, rebuilt 1977
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
234 ft
3 main spans
Daily traffic
8,421
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) SB over Or 273 (hwy 273) is a prestressed concrete stringer/multi-beam or girder carrying I-5 (hwy 001) SB over Or 273 (hwy 273) in Jackson County, Oregon. It was built in 1965 and reconstructed in 1977, so it is 60 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,421 vehicles a day, roughly 32% of them trucks, projected to reach 11,050 by 2042. The structure is 234 ft (71.3 m) long and 58 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesI-5 (hwy 001) SB
CrossesOr 273 (hwy 273)
Location5.4 MI N Ca State Line
RouteInterstate 5
CountyJackson County
StateOregon
Coordinates42.07316, -122.60589
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length234 ft (71.3 m)
Longest span87 ft (26.5 m)
Deck width58 ft (17.6 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,421 (2022)
Projected traffic11,050 by 2042
Trucks32%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed7.5 mi (12 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 I-5 (hwy 001) SB over Or 273 (hwy 273) built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1977.

What condition is I-5 (hwy 001) SB over Or 273 (hwy 273) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does I-5 (hwy 001) SB over Or 273 (hwy 273) carry?

About 8,421 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is I-5 (hwy 001) SB over Or 273 (hwy 273)?

The structure is 234 ft (71.3 m) long with a longest span of 87 ft (26.5 m) and a deck 58 ft wide.

Who owns I-5 (hwy 001) SB over Or 273 (hwy 273)?

It is owned by the State Highway Agency.