US Bridges

I-5 S-W Ramp over Henderson Blvd RR

FairPosted for load

Thurston County, Washington · 1.2 N JCT US 101 · Structure no. 0005295D0000000

Built
1957
68 years old, rebuilt 1990
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete Continuous
Length
228 ft
4 main spans
Daily traffic
4,197
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 S-W Ramp over Henderson Blvd RR is a concrete continuous tee beam carrying I-5 S-W Ramp over Henderson Blvd RR in Thurston County, Washington. It was built in 1957 and reconstructed in 1990, so it is 68 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. Its operating status is: posted for load restriction.

It carries about 4,197 vehicles a day, roughly 5% of them trucks, projected to reach 6,398 by 2039. The structure is 228 ft (69.5 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-5 S-W Ramp
CrossesHenderson Blvd RR
Location1.2 N JCT US 101
RouteInterstate 5
CountyThurston County
StateWashington
Coordinates47.0345, -122.89097
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length228 ft (69.5 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,197 (2023)
Projected traffic6,398 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 S-W Ramp over Henderson Blvd RR built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1990.

What condition is I-5 S-W Ramp over Henderson Blvd RR 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 November 2023.

How much traffic does I-5 S-W Ramp over Henderson Blvd RR carry?

About 4,197 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I-5 S-W Ramp over Henderson Blvd RR?

The structure is 228 ft (69.5 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns I-5 S-W Ramp over Henderson Blvd RR?

It is owned by the State Highway Agency.