US Bridges

N-W Ramp P1 18853 over I-5 SR 527 Broadway Av

Fair

Snohomish County, Washington · 5.4 N JCT SR 525 · Structure no. 0008707A0000000

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,765 ft
8 main spans
Daily traffic
16,700
2023 count
Owner
State
State Highway Agency

About this bridge

N-W Ramp P1 18853 over I-5 SR 527 Broadway Av is a steel continuous stringer/multi-beam or girder carrying N-W Ramp P1 18853 over I-5 SR 527 Broadway Av in Snohomish County, Washington. It was built in 1970, so it is 55 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 16,700 vehicles a day, roughly 5% of them trucks, projected to reach 22,585 by 2039. The structure is 1,765 ft (538 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesN-W Ramp P1 18853
CrossesI-5 SR 527 Broadway Av
Location5.4 N JCT SR 525
RouteInterstate 5
CountySnohomish County
StateWashington
Coordinates47.91614, -122.20633
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length1,765 ft (538 m)
Longest span252 ft (76.8 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,700 (2023)
Projected traffic22,585 by 2039
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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$35.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was N-W Ramp P1 18853 over I-5 SR 527 Broadway Av built?

It was built in 1970, making it 55 years old in 2025.

What condition is N-W Ramp P1 18853 over I-5 SR 527 Broadway Av 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 May 2024.

How much traffic does N-W Ramp P1 18853 over I-5 SR 527 Broadway Av carry?

About 16,700 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is N-W Ramp P1 18853 over I-5 SR 527 Broadway Av?

The structure is 1,765 ft (538 m) long with a longest span of 252 ft (76.8 m) and a deck 41 ft wide.

Who owns N-W Ramp P1 18853 over I-5 SR 527 Broadway Av?

It is owned by the State Highway Agency.