US Bridges

352 ST E over Tanwax Creek

Fair

Pierce County, Washington · .5 W JCT SR161 · Structure no. 082956000000000

Built
1954
71 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
800
2024 count
Owner
County
County Highway Agency

About this bridge

352 ST E over Tanwax Creek is a concrete tee beam carrying 352 ST E over Tanwax Creek in Pierce County, Washington. It was built in 1954, so it is 71 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 800 vehicles a day, roughly 5% of them trucks, projected to reach 1,320 by 2040. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 13 mi (21 km).

Carries352 ST E
CrossesTanwax Creek
Location.5 W JCT SR161
RouteCounty Highway 48960
Coordinates46.93694, -122.29417
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2024)
Projected traffic1,320 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 352 ST E over Tanwax Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is 352 ST E over Tanwax Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does 352 ST E over Tanwax Creek carry?

About 800 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 352 ST E over Tanwax Creek?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 22 ft wide.

Who owns 352 ST E over Tanwax Creek?

It is owned by the County Highway Agency.