US Bridges

I-5 Sbcd over SR 104/205th ST

Good

King County, Washington · 3.2 N JCT SR 523 · Structure no. 0014326C0000000

Built
1995
30 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
189 ft
3 main spans
Daily traffic
6,627
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 Sbcd over SR 104/205th ST is a prestressed concrete stringer/multi-beam or girder carrying I-5 Sbcd over SR 104/205th ST in King County, Washington. It was built in 1995, so it is 30 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 6,627 vehicles a day, roughly 5% of them trucks, projected to reach 10,143 by 2039. The structure is 189 ft (57.6 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-5 Sbcd
CrossesSR 104/205th ST
Location3.2 N JCT SR 523
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.77739, -122.31833
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 inspectionJune 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 rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length189 ft (57.6 m)
Longest span113 ft (34.4 m)
Deck width54 ft (16.4 m)
Roadway width49 ft (14.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,627 (2023)
Projected traffic10,143 by 2039
Trucks5%
Lanes on structure3
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$4.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 Sbcd over SR 104/205th ST built?

It was built in 1995, making it 30 years old in 2025.

What condition is I-5 Sbcd over SR 104/205th ST 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 June 2023.

How much traffic does I-5 Sbcd over SR 104/205th ST carry?

About 6,627 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I-5 Sbcd over SR 104/205th ST?

The structure is 189 ft (57.6 m) long with a longest span of 113 ft (34.4 m) and a deck 54 ft wide.

Who owns I-5 Sbcd over SR 104/205th ST?

It is owned by the State Highway Agency.