US Bridges

I-5 Ncd over S M ST

Fair

Pierce County, Washington · 0.5 N JCT SR 16 · Structure no. 0016958A0000000

Built
2006
19 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
232 ft
3 main spans
Daily traffic
58,308
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 Ncd over S M ST is a prestressed concrete continuous stringer/multi-beam or girder carrying I-5 Ncd over S M ST in Pierce County, Washington. It was built in 2006, so it is 19 years old, younger 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 58,308 vehicles a day, roughly 10% of them trucks, projected to reach 86,992 by 2039. The structure is 232 ft (70.7 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5 Ncd
CrossesS M ST
Location0.5 N JCT SR 16
RouteInterstate 5
CountyPierce County
StateWashington
Coordinates47.23006, -122.45133
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length232 ft (70.7 m)
Longest span82 ft (25 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,308 (2022)
Projected traffic86,992 by 2039
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 Ncd over S M ST built?

It was built in 2006, making it 19 years old in 2025.

What condition is I-5 Ncd over S M ST 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 Ncd over S M ST carry?

About 58,308 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is I-5 Ncd over S M ST?

The structure is 232 ft (70.7 m) long with a longest span of 82 ft (25 m) and a deck 73 ft wide.

Who owns I-5 Ncd over S M ST?

It is owned by the State Highway Agency.