US Bridges

I-5 over Log Dump RD & Bn RY

Poor

Cowlitz County, Washington · 1.6 N JCT SR 503 · Structure no. 0008952A0000000

Built
1972
53 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
675 ft
3 main spans
Daily traffic
33,912
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Log Dump RD & Bn RY is a steel continuous stringer/multi-beam or girder carrying I-5 over Log Dump RD & Bn RY in Cowlitz County, Washington. It was built in 1972, so it is 53 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 33,912 vehicles a day, roughly 18% of them trucks, projected to reach 44,621 by 2039. The structure is 675 ft (205.7 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5
CrossesLog Dump RD & Bn RY
Location1.6 N JCT SR 503
RouteInterstate 5
CountyCowlitz County
StateWashington
Coordinates45.92681, -122.75642
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length675 ft (205.7 m)
Longest span277 ft (84.4 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 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 and railroad
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$21.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Log Dump RD & Bn RY built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-5 over Log Dump RD & Bn RY in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

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

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

How long is I-5 over Log Dump RD & Bn RY?

The structure is 675 ft (205.7 m) long with a longest span of 277 ft (84.4 m) and a deck 55 ft wide.

Who owns I-5 over Log Dump RD & Bn RY?

It is owned by the State Highway Agency.