US Bridges

SR 169 over Newaukum Creek

Good

King County, Washington · 1.5 N JCT SR 164 · Structure no. 0013329A0000000

Built
1988
37 years old
Condition
Good
inspected May 2024
Type
Slab
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
10,724
2023 count
Owner
State
State Highway Agency

About this bridge

SR 169 over Newaukum Creek is a prestressed concrete slab carrying SR 169 over Newaukum Creek in King County, Washington. It was built in 1988, so it is 37 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 10,724 vehicles a day, roughly 8% of them trucks, projected to reach 13,943 by 2039. The structure is 47 ft (14.3 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR 169
CrossesNewaukum Creek
Location1.5 N JCT SR 164
RouteState Highway 169
Coordinates47.22596, -121.98966
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length47 ft (14.3 m)
Longest span46 ft (14 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,724 (2023)
Projected traffic13,943 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$960,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 169 over Newaukum Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is SR 169 over Newaukum 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 May 2024.

How much traffic does SR 169 over Newaukum Creek carry?

About 10,724 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 169 over Newaukum Creek?

The structure is 47 ft (14.3 m) long with a longest span of 46 ft (14 m) and a deck 44 ft wide.

Who owns SR 169 over Newaukum Creek?

It is owned by the State Highway Agency.