US Bridges

SR 9 over Stillaguamish R Haller

Good

Snohomish County, Washington · 0.2 N JCT SR 530 · Structure no. 0015305A0000000

Built
1999
26 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
709 ft
5 main spans
Daily traffic
9,490
2023 count
Owner
State
State Highway Agency

About this bridge

SR 9 over Stillaguamish R Haller is a steel continuous stringer/multi-beam or girder carrying SR 9 over Stillaguamish R Haller in Snohomish County, Washington. It was built in 1999, so it is 26 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 9,490 vehicles a day, roughly 6% of them trucks, projected to reach 12,436 by 2039. The structure is 709 ft (216.1 m) long and 38 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR 9
CrossesStillaguamish R Haller
Location0.2 N JCT SR 530
RouteState Highway 9
CountySnohomish County
StateWashington
Coordinates48.20362, -122.12945
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length709 ft (216.1 m)
Longest span157 ft (48 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,490 (2023)
Projected traffic12,436 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$12.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 9 over Stillaguamish R Haller built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR 9 over Stillaguamish R Haller 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 2023.

How much traffic does SR 9 over Stillaguamish R Haller carry?

About 9,490 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 9 over Stillaguamish R Haller?

The structure is 709 ft (216.1 m) long with a longest span of 157 ft (48 m) and a deck 38 ft wide.

Who owns SR 9 over Stillaguamish R Haller?

It is owned by the State Highway Agency.