US Bridges

US 101 over S Fork Boulder CR

Good

Grays Harbor County, Washington · 36.2 N JCT SR 109 · Structure no. 0016613A0000000

Built
2004
21 years old
Condition
Good
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
201 ft
3 main spans
Daily traffic
1,978
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over S Fork Boulder CR is a prestressed concrete continuous stringer/multi-beam or girder carrying US 101 over S Fork Boulder CR in Grays Harbor County, Washington. It was built in 2004, so it is 21 years old, younger 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 1,978 vehicles a day, roughly 15% of them trucks, projected to reach 2,345 by 2039. The structure is 201 ft (61.3 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesUS 101
CrossesS Fork Boulder CR
Location36.2 N JCT SR 109
RouteU.S. Route 101
CountyGrays Harbor County
StateWashington
Coordinates47.42139, -123.87631
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 2022
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 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 rating89 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length201 ft (61.3 m)
Longest span89 ft (27.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,978 (2023)
Projected traffic2,345 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over S Fork Boulder CR built?

It was built in 2004, making it 21 years old in 2025.

What condition is US 101 over S Fork Boulder CR 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 2022.

How much traffic does US 101 over S Fork Boulder CR carry?

About 1,978 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 101 over S Fork Boulder CR?

The structure is 201 ft (61.3 m) long with a longest span of 89 ft (27.1 m) and a deck 35 ft wide.

Who owns US 101 over S Fork Boulder CR?

It is owned by the State Highway Agency.