US Bridges

SR 529 over Bnrr

Good

Snohomish County, Washington · 3.6 N JCT SR 529 Spur · Structure no. 086055000000000

Built
1993
32 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
847 ft
10 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 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 5,807 vehicles a day, roughly 2% of them trucks, projected to reach 8,214 by 2039. The structure is 847 ft (258.2 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSR 529
CrossesBnrr
Location3.6 N JCT SR 529 Spur
RouteState Highway 529
Coordinates48.01667, -122.20667
Functional classUrban Other Principal Arterial

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 inspectionAugust 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 rating81 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length847 ft (258.2 m)
Longest span98 ft (29.9 m)
Deck width40 ft (12.3 m)
Roadway width26 ft (7.9 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$11.3 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 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 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 847 ft (258.2 m) long with a longest span of 98 ft (29.9 m) and a deck 40 ft wide.

Who owns SR 529 over Bnrr?

It is owned by the State Highway Agency.