Structure 8332 001 02866 · Jackson County, OR

I-5 (hwy 001) over Medford Viaduct

Carries I-5 (hwy 001) over Medford Viaduct, 2.6 Mi N Of Medford Scl.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,223 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

3,223 ft end to end, longest span 120 ft: about 9.0 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built196264 years old
Length3222.8 ft982.3 m
Daily traffic53,404counted 2022
Last inspectedMay 2024every 24 months

Location

StateOregon
CountyJackson
Location2.6 Mi N Of Medford Scl
CarriesI-5 (hwy 001)
CrossesMedford Viaduct
Coordinates42.32722, -122.86857

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length3222.8 ft (982.3 m)
Max Span120.1 ft (36.6 m)
Deck Width67.6 ft (20.6 m)
Deck Area20235.4 sq m
Main Spans8
Year Built1962

Traffic

Avg Daily Traffic53,404 (2022)
Truck Traffic12%
Lanes On Bridge4
Lanes Under Bridge17

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number08332 001 02866

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges