US Bridges

US 101 over Weaver Creek

Good

Mason County, Washington · 2.1 S JCT SR 106 · Structure no. 0008742A0000000

Built
1970
55 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
99 ft
3 main spans
Daily traffic
7,648
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Weaver Creek is a concrete continuous slab carrying US 101 over Weaver Creek in Mason County, Washington. It was built in 1970, so it is 55 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 7,648 vehicles a day, roughly 6% of them trucks, projected to reach 9,983 by 2039. The structure is 99 ft (30.2 m) long and 43 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 101
CrossesWeaver Creek
Location2.1 S JCT SR 106
RouteU.S. Route 101
CountyMason County
StateWashington
Coordinates47.30583, -123.17881
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length99 ft (30.2 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,648 (2023)
Projected traffic9,983 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Weaver Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is US 101 over Weaver 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 September 2023.

How much traffic does US 101 over Weaver Creek carry?

About 7,648 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 101 over Weaver Creek?

The structure is 99 ft (30.2 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns US 101 over Weaver Creek?

It is owned by the State Highway Agency.