US Bridges

108th Ave NE over Yarrow Creek

Good

King County, Washington · 5.27 E JCT SR 513 · Structure no. 0017963Y0000000

Built
2014
11 years old
Condition
Good
inspected August 2022
Type
Slab
Prestressed Concrete
Length
23 ft
1 main span
Daily traffic
12,500
2013 count
Owner
State
State Highway Agency

About this bridge

108th Ave NE over Yarrow Creek is a prestressed concrete slab carrying 108th Ave NE over Yarrow Creek in King County, Washington. It was built in 2014, so it is 11 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,500 vehicles a day, roughly 2% of them trucks, projected to reach 18,000 by 2033. The structure is 23 ft (7 m) long and 145 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries108th Ave NE
CrossesYarrow Creek
Location5.27 E JCT SR 513
RouteCity Street 520
Coordinates47.64068, -122.19654
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating53.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width145 ft (44.2 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2013)
Projected traffic18,000 by 2033
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 108th Ave NE over Yarrow Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is 108th Ave NE over Yarrow 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 2022.

How much traffic does 108th Ave NE over Yarrow Creek carry?

About 12,500 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is 108th Ave NE over Yarrow Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 145 ft wide.

Who owns 108th Ave NE over Yarrow Creek?

It is owned by the State Highway Agency.