US Bridges

I-5 over Harrison Ave

Fair

Lewis County, Washington · 1.1 N JCT SR 507 · Structure no. 0009251A0000000

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
208 ft
3 main spans
Daily traffic
24,769
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Harrison Ave is a prestressed concrete continuous stringer/multi-beam or girder carrying I-5 over Harrison Ave in Lewis 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 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 24,769 vehicles a day, roughly 17% of them trucks, projected to reach 33,067 by 2039. The structure is 208 ft (63.4 m) long and 87 ft wide.

CarriesI-5
CrossesHarrison Ave
Location1.1 N JCT SR 507
RouteInterstate 5
Coordinates46.72697, -122.97703
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length208 ft (63.4 m)
Longest span94 ft (28.7 m)
Deck width87 ft (26.4 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,769 (2023)
Projected traffic33,067 by 2039
Trucks17%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$8.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Harrison Ave built?

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

What condition is I-5 over Harrison Ave 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 June 2024.

How much traffic does I-5 over Harrison Ave carry?

About 24,769 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is I-5 over Harrison Ave?

The structure is 208 ft (63.4 m) long with a longest span of 94 ft (28.7 m) and a deck 87 ft wide.

Who owns I-5 over Harrison Ave?

It is owned by the State Highway Agency.