US Bridges

1-105 (hwy 227) over Willamette River

Fair

Lane County, Oregon · 00.8 MI E OR99W JCT · Structure no. 08966 227 00081

Built
1967
58 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
844 ft
9 main spans
Daily traffic
55,375
2022 count
Owner
State
State Highway Agency

About this bridge

1-105 (hwy 227) over Willamette River is a concrete continuous box beam or girders - multiple carrying 1-105 (hwy 227) over Willamette River in Lane County, Oregon. It was built in 1967, so it is 58 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 55,375 vehicles a day, roughly 4% of them trucks, projected to reach 60,600 by 2042. The structure is 844 ft (257.3 m) long and 81 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

Carries1-105 (hwy 227)
CrossesWillamette River
Location00.8 MI E OR99W JCT
RouteInterstate 105
StateOregon
Coordinates44.06376, -123.10088
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating16.8 US tons
Inventory rating13.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length844 ft (257.3 m)
Longest span126 ft (38.4 m)
Deck width81 ft (24.7 m)
Roadway width75 ft (23 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,375 (2022)
Projected traffic60,600 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed9.3 mi (15 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1-105 (hwy 227) over Willamette River built?

It was built in 1967, making it 58 years old in 2025.

What condition is 1-105 (hwy 227) over Willamette River 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 October 2024.

How much traffic does 1-105 (hwy 227) over Willamette River carry?

About 55,375 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 1-105 (hwy 227) over Willamette River?

The structure is 844 ft (257.3 m) long with a longest span of 126 ft (38.4 m) and a deck 81 ft wide.

Who owns 1-105 (hwy 227) over Willamette River?

It is owned by the State Highway Agency.