US Bridges

SR 432 over I-5

Fair

Cowlitz County, Washington · 2.7 E JCT SR 411 · Structure no. 0005968A0000000

Built
1959
66 years old, rebuilt 1976
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
4 main spans
Daily traffic
20,005
2023 count
Owner
State
State Highway Agency

About this bridge

SR 432 over I-5 is a prestressed concrete stringer/multi-beam or girder carrying SR 432 over I-5 in Cowlitz County, Washington. It was built in 1959 and reconstructed in 1976, so it is 66 years old, older than the Washington average of 49.8 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 20,005 vehicles a day, roughly 11% of them trucks, projected to reach 24,546 by 2039. The structure is 280 ft (85.3 m) long and 59 ft wide.

Location

Open in Google Maps
CarriesSR 432
CrossesI-5
Location2.7 E JCT SR 411
RouteState Highway 432
CountyCowlitz County
StateWashington
Coordinates46.10692, -122.87958
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span60 ft (18.3 m)
Deck width59 ft (18.1 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,005 (2023)
Projected traffic24,546 by 2039
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 432 over I-5 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1976.

What condition is SR 432 over I-5 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 May 2023.

How much traffic does SR 432 over I-5 carry?

About 20,005 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 432 over I-5?

The structure is 280 ft (85.3 m) long with a longest span of 60 ft (18.3 m) and a deck 59 ft wide.

Who owns SR 432 over I-5?

It is owned by the State Highway Agency.