US Bridges

Chemawa Road over I-5 (hwy 1)

Fair

Marion County, Oregon · 003 MI N Salem Ncl · Structure no. 07855B001C26020

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
392 ft
2 main spans
Daily traffic
102,351
2022 count
Owner
State
State Highway Agency

About this bridge

Chemawa Road over I-5 (hwy 1) is a steel continuous stringer/multi-beam or girder carrying Chemawa 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 102,351 vehicles a day, roughly 13% of them trucks, projected to reach 109,800 by 2042. The structure is 392 ft (119.5 m) long and 95 ft wide.

Location

Open in Google Maps
CarriesChemawa Road
CrossesI-5 (hwy 1)
Location003 MI N Salem Ncl
RouteState Highway 5
CountyMarion County
StateOregon
Coordinates45.00537, -122.99645
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 20
Structure length392 ft (119.5 m)
Longest span206 ft (62.8 m)
Deck width95 ft (29.1 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102,351 (2022)
Projected traffic109,800 by 2042
Trucks13%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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$6.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

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

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

What condition is Chemawa 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 Chemawa Road over I-5 (hwy 1) carry?

About 102,351 vehicles per day (2022 count), of which roughly 13% are trucks.

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

The structure is 392 ft (119.5 m) long with a longest span of 206 ft (62.8 m) and a deck 95 ft wide.

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

It is owned by the State Highway Agency.