US Bridges

HWY 001 (I-5) over Jantzen Ped Tunnel

Fair

Multnomah County, Oregon · 0.5 MI S of Interstate Br · Structure no. 04516A001 30793

Built
1916
109 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
29 ft
1 main span
Daily traffic
130,027
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 001 (I-5) over Jantzen Ped Tunnel is a concrete tee beam carrying HWY 001 (I-5) over Jantzen Ped Tunnel in Multnomah County, Oregon. It was built in 1916, so it is 109 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 130,027 vehicles a day, roughly 9% of them trucks, projected to reach 131,200 by 2042. The structure is 29 ft (8.8 m) long and 239 ft wide.

Location

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CarriesHWY 001 (I-5)
CrossesJantzen Ped Tunnel
Location0.5 MI S of Interstate Br
RouteInterstate 5
CountyMultnomah County
StateOregon
Coordinates45.612, -122.6789
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.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating11.8 US tons
Inventory rating8.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width239 ft (72.9 m)
Roadway width160 ft (48.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130,027 (2022)
Projected traffic131,200 by 2042
Trucks9%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$193,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY 001 (I-5) over Jantzen Ped Tunnel built?

It was built in 1916, making it 109 years old in 2025.

What condition is HWY 001 (I-5) over Jantzen Ped Tunnel 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 December 2024.

How much traffic does HWY 001 (I-5) over Jantzen Ped Tunnel carry?

About 130,027 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is HWY 001 (I-5) over Jantzen Ped Tunnel?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 239 ft wide.

Who owns HWY 001 (I-5) over Jantzen Ped Tunnel?

It is owned by the State Highway Agency.