US Bridges

SR 9 over 72nd Street SE

Good

Snohomish County, Washington · 3.7 N JCT SR 96 · Structure no. 0007157C0000000

Built
1963
62 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
246 ft
3 main spans
Daily traffic
22,270
2023 count
Owner
State
State Highway Agency

About this bridge

SR 9 over 72nd Street SE is a prestressed concrete stringer/multi-beam or girder carrying SR 9 over 72nd Street SE in Snohomish County, Washington. It was built in 1963, so it is 62 years old, older 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 22,270 vehicles a day, roughly 8% of them trucks, projected to reach 32,286 by 2039. The structure is 246 ft (75 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR 9
Crosses72nd Street SE
Location3.7 N JCT SR 96
RouteState Highway 9
Coordinates47.93111, -122.10517
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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length246 ft (75 m)
Longest span90 ft (27.4 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,270 (2023)
Projected traffic32,286 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$4.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 9 over 72nd Street SE built?

It was built in 1963, making it 62 years old in 2025.

What condition is SR 9 over 72nd Street SE 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 July 2024.

How much traffic does SR 9 over 72nd Street SE carry?

About 22,270 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 9 over 72nd Street SE?

The structure is 246 ft (75 m) long with a longest span of 90 ft (27.4 m) and a deck 36 ft wide.

Who owns SR 9 over 72nd Street SE?

It is owned by the State Highway Agency.