US Bridges

I-5 over Martin Way

Fair

Thurston County, Washington · 5.0 N JCT US 101 · Structure no. 0008100B0000000

Built
1967
58 years old, rebuilt 1988
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
282 ft
3 main spans
Daily traffic
49,562
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Martin Way is a prestressed concrete stringer/multi-beam or girder carrying I-5 over Martin Way in Thurston County, Washington. It was built in 1967 and reconstructed in 1988, so it is 58 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 49,562 vehicles a day, roughly 11% of them trucks, projected to reach 73,068 by 2039. The structure is 282 ft (86 m) long and 55 ft wide.

CarriesI-5
CrossesMartin Way
Location5.0 N JCT US 101
RouteInterstate 5
Coordinates47.04867, -122.81875
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating14.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length282 ft (86 m)
Longest span134 ft (40.8 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,562 (2023)
Projected traffic73,068 by 2039
Trucks11%
Lanes on structure3
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$7.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Martin Way built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1988.

What condition is I-5 over Martin Way 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 over Martin Way carry?

About 49,562 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I-5 over Martin Way?

The structure is 282 ft (86 m) long with a longest span of 134 ft (40.8 m) and a deck 55 ft wide.

Who owns I-5 over Martin Way?

It is owned by the State Highway Agency.