US Bridges

I-105 (hwy 227) CO over Coburg Road

Fair

Lane County, Oregon · 01.9 MI E OR99W JCT · Structure no. 08700B227 00197

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
344 ft
1 main span
Daily traffic
9,811
2022 count
Owner
State
State Highway Agency

About this bridge

I-105 (hwy 227) CO over Coburg Road is a steel stringer/multi-beam or girder carrying I-105 (hwy 227) CO over Coburg Road in Lane County, Oregon. It was built in 1961, so it is 64 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 9,811 vehicles a day, roughly 4% of them trucks, projected to reach 76,300 by 2036. The structure is 344 ft (104.9 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-105 (hwy 227) CO
CrossesCoburg Road
Location01.9 MI E OR99W JCT
RouteInterstate 105
CountyLane County
StateOregon
Coordinates44.06319, -123.07885
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20 + Mod
Structure length344 ft (104.9 m)
Longest span106 ft (32.3 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,811 (2022)
Projected traffic76,300 by 2036
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1961, making it 64 years old in 2025.

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

About 9,811 vehicles per day (2022 count), of which roughly 4% are trucks.

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

The structure is 344 ft (104.9 m) long with a longest span of 106 ft (32.3 m) and a deck 27 ft wide.

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

It is owned by the State Highway Agency.