US Bridges

I-5 over Log Dump RD

Fair

Cowlitz County, Washington · 1.6 N JCT SR 503 · Structure no. 0004885A0000000

Built
1955
70 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
104 ft
3 main spans
Daily traffic
33,912
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Log Dump RD is a concrete continuous tee beam carrying I-5 over Log Dump RD in Cowlitz County, Washington. It was built in 1955, so it is 70 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 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 33,912 vehicles a day, roughly 18% of them trucks, projected to reach 44,621 by 2039. The structure is 104 ft (31.7 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-5
CrossesLog Dump RD
Location1.6 N JCT SR 503
RouteInterstate 5
CountyCowlitz County
StateWashington
Coordinates45.92741, -122.75592
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating33 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length104 ft (31.7 m)
Longest span40 ft (12.2 m)
Deck width62 ft (18.8 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,912 (2023)
Projected traffic44,621 by 2039
Trucks18%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Log Dump RD built?

It was built in 1955, making it 70 years old in 2025.

What condition is I-5 over Log Dump RD 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 2024.

How much traffic does I-5 over Log Dump RD carry?

About 33,912 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-5 over Log Dump RD?

The structure is 104 ft (31.7 m) long with a longest span of 40 ft (12.2 m) and a deck 62 ft wide.

Who owns I-5 over Log Dump RD?

It is owned by the State Highway Agency.