US Bridges

US 101 over Schneider Creek

Good

Thurston County, Washington · 2.7 S Mason CO · Structure no. 0005738D0000000

Built
1958
67 years old
Condition
Good
inspected August 2021
Type
Slab
Concrete
Length
28 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,427 vehicles a day, roughly 7% of them trucks, projected to reach 19,862 by 2039. The structure is 28 ft (8.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 101
CrossesSchneider Creek
Location2.7 S Mason CO
RouteU.S. Route 101
Coordinates47.08127, -123.02347
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span21 ft (6.4 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.6 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$638,000 (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 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 2021.

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 28 ft (8.5 m) long with a longest span of 21 ft (6.4 m) and a deck 42 ft wide.

Who owns US 101 over Schneider Creek?

It is owned by the State Highway Agency.