US Bridges

Keene Road over I-5 (hwy 1)

Fair

Marion County, Oregon · 043 MI S Woodburn Ncl · Structure no. 07848A001 26755

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
320 ft
2 main spans
Daily traffic
94,995
2022 count
Owner
State
State Highway Agency

About this bridge

Keene Road over I-5 (hwy 1) is a prestressed concrete continuous stringer/multi-beam or girder carrying Keene Road over I-5 (hwy 1) in Marion County, Oregon. It was built in 1975, so it is 50 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 94,995 vehicles a day, roughly 14% of them trucks, projected to reach 105,200 by 2042. The structure is 320 ft (97.5 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesKeene Road
CrossesI-5 (hwy 1)
Location043 MI S Woodburn Ncl
RouteCounty Highway 0
CountyMarion County
StateOregon
Coordinates45.10046, -122.93219
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length320 ft (97.5 m)
Longest span116 ft (35.4 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94,995 (2022)
Projected traffic105,200 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Keene Road over I-5 (hwy 1) built?

It was built in 1975, making it 50 years old in 2025.

What condition is Keene Road 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 August 2024.

How much traffic does Keene Road over I-5 (hwy 1) carry?

About 94,995 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Keene Road over I-5 (hwy 1)?

The structure is 320 ft (97.5 m) long with a longest span of 116 ft (35.4 m) and a deck 34 ft wide.

Who owns Keene Road over I-5 (hwy 1)?

It is owned by the State Highway Agency.