US Bridges

I-5 on Ramp over Henderson Blvd

Good

Thurston County, Washington · 1.2 N JCT US 101 · Structure no. 0012835D0000000

Built
1986
39 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
240 ft
3 main spans
Daily traffic
3,197
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 on Ramp over Henderson Blvd is a prestressed concrete continuous box beam or girders - multiple carrying I-5 on Ramp over Henderson Blvd in Thurston County, Washington. It was built in 1986, so it is 39 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,197 vehicles a day, roughly 2% of them trucks, projected to reach 4,873 by 2039. The structure is 240 ft (73.2 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-5 on Ramp
CrossesHenderson Blvd
Location1.2 N JCT US 101
RouteInterstate 5
CountyThurston County
StateWashington
Coordinates47.03128, -122.89322
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length240 ft (73.2 m)
Longest span112 ft (34.1 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,197 (2023)
Projected traffic4,873 by 2039
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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$3.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 on Ramp over Henderson Blvd built?

It was built in 1986, making it 39 years old in 2025.

What condition is I-5 on Ramp over Henderson Blvd in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does I-5 on Ramp over Henderson Blvd carry?

About 3,197 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is I-5 on Ramp over Henderson Blvd?

The structure is 240 ft (73.2 m) long with a longest span of 112 ft (34.1 m) and a deck 29 ft wide.

Who owns I-5 on Ramp over Henderson Blvd?

It is owned by the State Highway Agency.