US Bridges

US 2 over Tunnel Creek

Good

King County, Washington · 19.8 E Snohomish CO · Structure no. 0002719A0000000

Built
1941
84 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
190 ft
5 main spans
Daily traffic
2,795
2023 count
Owner
State
State Highway Agency

About this bridge

US 2 over Tunnel Creek is a concrete continuous tee beam carrying US 2 over Tunnel Creek in King County, Washington. It was built in 1941, so it is 84 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 2,795 vehicles a day, roughly 5% of them trucks, projected to reach 3,659 by 2039. The structure is 190 ft (57.9 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 2
CrossesTunnel Creek
Location19.8 E Snohomish CO
RouteU.S. Route 2
Coordinates47.71814, -121.12275
Functional classRural Principal Arterial - Other

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length190 ft (57.9 m)
Longest span60 ft (18.3 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,795 (2023)
Projected traffic3,659 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 2 over Tunnel Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is US 2 over Tunnel Creek 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 2023.

How much traffic does US 2 over Tunnel Creek carry?

About 2,795 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 2 over Tunnel Creek?

The structure is 190 ft (57.9 m) long with a longest span of 60 ft (18.3 m) and a deck 27 ft wide.

Who owns US 2 over Tunnel Creek?

It is owned by the State Highway Agency.