US Bridges

SR 529 over Bnrr

Good

Snohomish County, Washington · 1.5 N JCT SR 529 Spur · Structure no. 085900000000000

Built
1991
34 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
631 ft
7 main spans
Daily traffic
13,991
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 1991, so it is 34 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 13,991 vehicles a day, roughly 2% of them trucks, projected to reach 17,917 by 2039. The structure is 631 ft (192.3 m) long and 88 ft wide.

CarriesSR 529
CrossesBnrr
Location1.5 N JCT SR 529 Spur
RouteState Highway 529
Coordinates47.98822, -122.21374
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.4 US tons
Inventory rating15.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length631 ft (192.3 m)
Longest span108 ft (32.9 m)
Deck width88 ft (26.8 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,991 (2023)
Projected traffic17,917 by 2039
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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$22.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 529 over Bnrr built?

It was built in 1991, making it 34 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 October 2023.

How much traffic does SR 529 over Bnrr carry?

About 13,991 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR 529 over Bnrr?

The structure is 631 ft (192.3 m) long with a longest span of 108 ft (32.9 m) and a deck 88 ft wide.

Who owns SR 529 over Bnrr?

It is owned by the State Highway Agency.