US Bridges

Seven Mile Lane over I-5 (hwy 1)

Fair

Linn County, Oregon · 136 MI N of S 228 · Structure no. 08228 001 23012

Built
1958
67 years old, rebuilt 2010
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete Continuous
Length
308 ft
4 main spans
Daily traffic
2,424
2010 count
Owner
State
State Highway Agency

About this bridge

Seven Mile Lane over I-5 (hwy 1) is a concrete continuous tee beam carrying Seven Mile Lane over I-5 (hwy 1) in Linn County, Oregon. It was built in 1958 and reconstructed in 2010, so it is 67 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 5 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 2,424 vehicles a day, roughly 17% of them trucks, projected to reach 3,310 by 2030. The structure is 308 ft (93.9 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSeven Mile Lane
CrossesI-5 (hwy 1)
Location136 MI N of S 228
RouteCounty Highway 0
CountyLinn County
StateOregon
Coordinates44.58514, -123.06196
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length308 ft (93.9 m)
Longest span96 ft (29.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,424 (2010)
Projected traffic3,310 by 2030
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Seven Mile Lane over I-5 (hwy 1) built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2010.

What condition is Seven Mile Lane over I-5 (hwy 1) 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 January 2023.

How much traffic does Seven Mile Lane over I-5 (hwy 1) carry?

About 2,424 vehicles per day (2010 count), of which roughly 17% are trucks.

How long is Seven Mile Lane over I-5 (hwy 1)?

The structure is 308 ft (93.9 m) long with a longest span of 96 ft (29.3 m) and a deck 31 ft wide.

Who owns Seven Mile Lane over I-5 (hwy 1)?

It is owned by the State Highway Agency.