US Bridges

NE 45th ST over I-5

Fair

King County, Washington · 1.3 N JCT SR 520 · Structure no. 0006111A0000000

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
241 ft
3 main spans
Daily traffic
28,856
2012 count
Owner
State
State Highway Agency

About this bridge

NE 45th ST over I-5 is a concrete continuous box beam or girders - multiple carrying NE 45th ST over I-5 in King County, Washington. It was built in 1960, so it is 65 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 28,856 vehicles a day, roughly 5% of them trucks, projected to reach 46,170 by 2036. The structure is 241 ft (73.5 m) long and 79 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNE 45th ST
CrossesI-5
Location1.3 N JCT SR 520
RouteCity Street 0
Coordinates47.66133, -122.32264
Functional classUrban Other Principal Arterial

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length241 ft (73.5 m)
Longest span94 ft (28.7 m)
Deck width79 ft (24.1 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,856 (2012)
Projected traffic46,170 by 2036
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$6.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NE 45th ST over I-5 built?

It was built in 1960, making it 65 years old in 2025.

What condition is NE 45th ST over I-5 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 2024.

How much traffic does NE 45th ST over I-5 carry?

About 28,856 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is NE 45th ST over I-5?

The structure is 241 ft (73.5 m) long with a longest span of 94 ft (28.7 m) and a deck 79 ft wide.

Who owns NE 45th ST over I-5?

It is owned by the State Highway Agency.