US Bridges

US 101 over Schneider Creek

Fair

Thurston County, Washington · 2.7 S Mason CO · Structure no. 0005738C0000000

Built
1958
67 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
13,427
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Schneider Creek is a concrete slab carrying US 101 over Schneider Creek in Thurston County, Washington. It was built in 1958, so it is 67 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 13,427 vehicles a day, roughly 7% of them trucks, projected to reach 19,862 by 2039. The structure is 27 ft (8.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 101
CrossesSchneider Creek
Location2.7 S Mason CO
RouteU.S. Route 101
CountyThurston County
StateWashington
Coordinates47.08108, -123.02356
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum 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 rating62.9 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span26 ft (7.8 m)
Deck width42 ft (12.8 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,427 (2023)
Projected traffic19,862 by 2039
Trucks7%
Lanes on structure2
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$513,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Schneider Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is US 101 over Schneider 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 2023.

How much traffic does US 101 over Schneider Creek carry?

About 13,427 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 101 over Schneider Creek?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.8 m) and a deck 42 ft wide.

Who owns US 101 over Schneider Creek?

It is owned by the State Highway Agency.