US Bridges

US 101 over Creek/Rr/Street

Fair

Mason County, Washington · 3.1 S JCT SR 102 · Structure no. 0009361B0000000

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
338 ft
4 main spans
Daily traffic
18,182
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Creek/Rr/Street is a prestressed concrete continuous stringer/multi-beam or girder carrying US 101 over Creek/Rr/Street in Mason County, Washington. It was built in 1973, so it is 52 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 18,182 vehicles a day, roughly 8% of them trucks, projected to reach 23,820 by 2039. The structure is 338 ft (103 m) long and 61 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesUS 101
CrossesCreek/Rr/Street
Location3.1 S JCT SR 102
RouteU.S. Route 101
CountyMason County
StateWashington
Coordinates47.21109, -123.12861
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating49.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length338 ft (103 m)
Longest span97 ft (29.6 m)
Deck width61 ft (18.7 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,182 (2023)
Projected traffic23,820 by 2039
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed3.7 mi (6 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$8.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Creek/Rr/Street built?

It was built in 1973, making it 52 years old in 2025.

What condition is US 101 over Creek/Rr/Street 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 September 2023.

How much traffic does US 101 over Creek/Rr/Street carry?

About 18,182 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 101 over Creek/Rr/Street?

The structure is 338 ft (103 m) long with a longest span of 97 ft (29.6 m) and a deck 61 ft wide.

Who owns US 101 over Creek/Rr/Street?

It is owned by the State Highway Agency.