US Bridges

I-5 (hwy 001) over Patterson Slough

Fair

Lane County, Oregon · 013 MI N of Eugene Scl · Structure no. 21041 001 19299

Built
2010
15 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
1 main span
Daily traffic
57,690
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) over Patterson Slough is a prestressed concrete stringer/multi-beam or girder carrying I-5 (hwy 001) over Patterson Slough in Lane County, Oregon. It was built in 2010, so it is 15 years old, younger 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 57,690 vehicles a day, roughly 17% of them trucks, projected to reach 75,000 by 2042. The structure is 180 ft (54.9 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5 (hwy 001)
CrossesPatterson Slough
Location013 MI N of Eugene Scl
RouteInterstate 5
CountyLane County
StateOregon
Coordinates44.04855, -123.05024
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating64.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length180 ft (54.9 m)
Longest span180 ft (54.9 m)
Deck width67 ft (20.5 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,690 (2022)
Projected traffic75,000 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 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 I-5 (hwy 001) over Patterson Slough built?

It was built in 2010, making it 15 years old in 2025.

What condition is I-5 (hwy 001) over Patterson Slough 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 March 2023.

How much traffic does I-5 (hwy 001) over Patterson Slough carry?

About 57,690 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is I-5 (hwy 001) over Patterson Slough?

The structure is 180 ft (54.9 m) long with a longest span of 180 ft (54.9 m) and a deck 67 ft wide.

Who owns I-5 (hwy 001) over Patterson Slough?

It is owned by the State Highway Agency.