US Bridges

I-5 (hwy 001) over Medford Viaduct

Fair

Jackson County, Oregon · 2.6 MI N of Medford Scl · Structure no. 08332 001 02866

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
3,223 ft
8 main spans
Daily traffic
53,404
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) over Medford Viaduct is a steel stringer/multi-beam or girder carrying I-5 (hwy 001) over Medford Viaduct in Jackson County, Oregon. It was built in 1962, so it is 63 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 53,404 vehicles a day, roughly 12% of them trucks, projected to reach 68,600 by 2042. The structure is 3,223 ft (982.3 m) long and 68 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesI-5 (hwy 001)
CrossesMedford Viaduct
Location2.6 MI N of Medford Scl
RouteInterstate 5
CountyJackson County
StateOregon
Coordinates42.32722, -122.86857
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.1 US tons
Inventory rating16.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8 (+39 approach)
Design loadHS 20
Structure length3,223 ft (982.3 m)
Longest span120 ft (36.6 m)
Deck width68 ft (20.6 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,404 (2022)
Projected traffic68,600 by 2042
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed9.9 mi (16 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) over Medford Viaduct built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-5 (hwy 001) over Medford Viaduct 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 May 2024.

How much traffic does I-5 (hwy 001) over Medford Viaduct carry?

About 53,404 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I-5 (hwy 001) over Medford Viaduct?

The structure is 3,223 ft (982.3 m) long with a longest span of 120 ft (36.6 m) and a deck 68 ft wide.

Who owns I-5 (hwy 001) over Medford Viaduct?

It is owned by the State Highway Agency.