US Bridges

I-5 over Sbcd NE110th ST

Fair

King County, Washington · 2.0 N JCT SR 522 · Structure no. 0007156I0000000

Built
1964
61 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
166 ft
3 main spans
Daily traffic
5,437
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 over Sbcd NE110th ST is a prestressed concrete stringer/multi-beam or girder carrying I-5 over Sbcd NE110th ST in King County, Washington. It was built in 1964, so it is 61 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 5,437 vehicles a day, roughly 5% of them trucks, projected to reach 8,058 by 2039. The structure is 166 ft (50.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-5
CrossesSbcd NE110th ST
Location2.0 N JCT SR 522
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.70842, -122.33039
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length166 ft (50.6 m)
Longest span80 ft (24.4 m)
Deck width26 ft (7.8 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,437 (2022)
Projected traffic8,058 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Sbcd NE110th ST built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-5 over Sbcd NE110th 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 June 2023.

How much traffic does I-5 over Sbcd NE110th ST carry?

About 5,437 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is I-5 over Sbcd NE110th ST?

The structure is 166 ft (50.6 m) long with a longest span of 80 ft (24.4 m) and a deck 26 ft wide.

Who owns I-5 over Sbcd NE110th ST?

It is owned by the State Highway Agency.