US Bridges

I-105 (hwy 227) over Coburg Road

Fair

Lane County, Oregon · 01.9 MI E OR99W JCT · Structure no. 08700A227 00196

Built
1964
61 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
476 ft
2 main spans
Daily traffic
59,050
2022 count
Owner
State
State Highway Agency

About this bridge

I-105 (hwy 227) over Coburg Road is a steel continuous stringer/multi-beam or girder carrying I-105 (hwy 227) over Coburg Road in Lane County, Oregon. It was built in 1964, so it is 61 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 59,050 vehicles a day, roughly 4% of them trucks, projected to reach 65,000 by 2042. The structure is 476 ft (145.1 m) long and 68 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

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CarriesI-105 (hwy 227)
CrossesCoburg Road
Location01.9 MI E OR99W JCT
RouteInterstate 105
CountyLane County
StateOregon
Coordinates44.06234, -123.08028
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+6 approach)
Design loadHS 20 + Mod
Structure length476 ft (145.1 m)
Longest span136 ft (41.5 m)
Deck width68 ft (20.6 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,050 (2022)
Projected traffic65,000 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed4.3 mi (7 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$5.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-105 (hwy 227) over Coburg Road built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-105 (hwy 227) over Coburg Road 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 I-105 (hwy 227) over Coburg Road carry?

About 59,050 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is I-105 (hwy 227) over Coburg Road?

The structure is 476 ft (145.1 m) long with a longest span of 136 ft (41.5 m) and a deck 68 ft wide.

Who owns I-105 (hwy 227) over Coburg Road?

It is owned by the State Highway Agency.