US Bridges

NE 60th ST over SR 520

Good

King County, Washington · 4.3 E JCT I-405 · Structure no. 0011314B0000000

Built
1980
45 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
254 ft
2 main spans
Daily traffic
3,200
2008 count
Owner
State
State Highway Agency

About this bridge

NE 60th ST over SR 520 is a prestressed concrete continuous stringer/multi-beam or girder carrying NE 60th ST over SR 520 in King County, Washington. It was built in 1980, so it is 45 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 3,200 vehicles a day, roughly 5% of them trucks, projected to reach 5,171 by 2036. The structure is 254 ft (77.4 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNE 60th ST
CrossesSR 520
Location4.3 E JCT I-405
RouteCity Street 0
Coordinates47.66064, -122.13481
Functional classUrban Collector

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 inspectionMay 2024
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 rating99 US tons
Inventory rating58 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length254 ft (77.4 m)
Longest span134 ft (40.8 m)
Deck width56 ft (17.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2008)
Projected traffic5,171 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$5.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NE 60th ST over SR 520 built?

It was built in 1980, making it 45 years old in 2025.

What condition is NE 60th ST over SR 520 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 May 2024.

How much traffic does NE 60th ST over SR 520 carry?

About 3,200 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is NE 60th ST over SR 520?

The structure is 254 ft (77.4 m) long with a longest span of 134 ft (40.8 m) and a deck 56 ft wide.

Who owns NE 60th ST over SR 520?

It is owned by the State Highway Agency.