US Bridges

18th Ave over Amazon Channel

Fair

Lane County, Oregon · Eugene 18&AMAZON Chan · Structure no. 40012 000 00676

Built
1951
74 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
17,657
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

18th Ave over Amazon Channel is a concrete continuous culvert carrying 18th Ave over Amazon Channel in Lane County, Oregon. It was built in 1951, so it is 74 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 17,657 vehicles a day, roughly 5% of them trucks, projected to reach 18,407 by 2025. The structure is 22 ft (6.7 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries18th Ave
CrossesAmazon Channel
LocationEugene 18&AMAZON Chan
RouteCity Street U1030
CountyLane County
StateOregon
Coordinates44.04004, -123.08895
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width54 ft (16.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,657 (2020)
Projected traffic18,407 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 18th Ave over Amazon Channel built?

It was built in 1951, making it 74 years old in 2025.

What condition is 18th Ave over Amazon Channel 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 May 2023.

How much traffic does 18th Ave over Amazon Channel carry?

About 17,657 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is 18th Ave over Amazon Channel?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m) and a deck 54 ft wide.

Who owns 18th Ave over Amazon Channel?

It is owned by the City or Municipal Highway Agency.