US Bridges

SR 529 over Bnrr

Fair

Snohomish County, Washington · 3.6 N JCT SR 529 Spur · Structure no. 086054000000000

Built
1993
32 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
798 ft
9 main spans
Daily traffic
5,807
2023 count
Owner
State
State Highway Agency

About this bridge

SR 529 over Bnrr is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 529 over Bnrr in Snohomish County, Washington. It was built in 1993, so it is 32 years old, younger 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 5,807 vehicles a day, roughly 2% of them trucks, projected to reach 8,214 by 2039. The structure is 798 ft (243.2 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 529
CrossesBnrr
Location3.6 N JCT SR 529 Spur
RouteState Highway 529
CountySnohomish County
StateWashington
Coordinates48.01639, -122.20722
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating82 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length798 ft (243.2 m)
Longest span105 ft (32 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,807 (2023)
Projected traffic8,214 by 2039
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 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$12.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 529 over Bnrr built?

It was built in 1993, making it 32 years old in 2025.

What condition is SR 529 over Bnrr 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 August 2024.

How much traffic does SR 529 over Bnrr carry?

About 5,807 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR 529 over Bnrr?

The structure is 798 ft (243.2 m) long with a longest span of 105 ft (32 m) and a deck 35 ft wide.

Who owns SR 529 over Bnrr?

It is owned by the State Highway Agency.