US Bridges

W 11th Ave over Amazon Creek

Good

Lane County, Oregon · Eugene 11th Amazon Ch · Structure no. 40040 000 00185

Built
1977
48 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
121 ft
3 main spans
Daily traffic
33,645
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

W 11th Ave over Amazon Creek is a prestressed concrete slab carrying W 11th Ave over Amazon Creek in Lane County, Oregon. It was built in 1977, so it is 48 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 33,645 vehicles a day, roughly 30% of them trucks, projected to reach 57,259 by 2025. The structure is 121 ft (36.9 m) long and 98 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesW 11th Ave
CrossesAmazon Creek
LocationEugene 11th Amazon Ch
RouteCity Street U1020
CountyLane County
StateOregon
Coordinates44.04825, -123.15926
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span40 ft (12.2 m)
Deck width98 ft (29.9 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,645 (2020)
Projected traffic57,259 by 2025
Trucks30%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 W 11th Ave over Amazon Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is W 11th Ave over Amazon Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does W 11th Ave over Amazon Creek carry?

About 33,645 vehicles per day (2020 count), of which roughly 30% are trucks.

How long is W 11th Ave over Amazon Creek?

The structure is 121 ft (36.9 m) long with a longest span of 40 ft (12.2 m) and a deck 98 ft wide.

Who owns W 11th Ave over Amazon Creek?

It is owned by the City or Municipal Highway Agency.