US Bridges

Plum ST over China Creek

Fair

Lewis County, Washington · .2 N Jct. SR 507 · Structure no. 085091000000000

Built
1944
81 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
113
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Plum ST over China Creek is a concrete continuous slab carrying Plum ST over China Creek in Lewis County, Washington. It was built in 1944, so it is 81 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 113 vehicles a day, roughly 19% of them trucks, projected to reach 159 by 2042. The structure is 22 ft (6.7 m) long and 63 ft wide.

CarriesPlum ST
CrossesChina Creek
Location.2 N Jct. SR 507
RouteCity Street 18007
Coordinates46.71525, -122.96922
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span9 ft (2.8 m)
Deck width63 ft (19.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2024)
Projected traffic159 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Plum ST over China Creek built?

It was built in 1944, making it 81 years old in 2025.

What condition is Plum ST over China 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 October 2024.

How much traffic does Plum ST over China Creek carry?

About 113 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is Plum ST over China Creek?

The structure is 22 ft (6.7 m) long with a longest span of 9 ft (2.8 m) and a deck 63 ft wide.

Who owns Plum ST over China Creek?

It is owned by the City or Municipal Highway Agency.