US Bridges

US 101 N-W Ramp over US 101

Good

Grays Harbor County, Washington · 0.2 N JCT SR 105 · Structure no. 0012643A0000000

Built
1985
40 years old
Condition
Good
inspected May 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,456 ft
14 main spans
Daily traffic
4,179
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 N-W Ramp over US 101 is a steel continuous girder and floorbeam system carrying US 101 N-W Ramp over US 101 in Grays Harbor County, Washington. It was built in 1985, so it is 40 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 4,179 vehicles a day, roughly 9% of them trucks, projected to reach 4,316 by 2039. The structure is 1,456 ft (443.8 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 101 N-W Ramp
CrossesUS 101
Location0.2 N JCT SR 105
RouteU.S. Route 101
CountyGrays Harbor County
StateWashington
Coordinates46.97333, -123.81092
Functional classUrban Other Principal Arterial

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans14 (+4 approach)
Design loadHS 20 + Mod
Structure length1,456 ft (443.8 m)
Longest span102 ft (31.1 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,179 (2023)
Projected traffic4,316 by 2039
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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$11.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 101 N-W Ramp over US 101 built?

It was built in 1985, making it 40 years old in 2025.

What condition is US 101 N-W Ramp over US 101 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 May 2023.

How much traffic does US 101 N-W Ramp over US 101 carry?

About 4,179 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 101 N-W Ramp over US 101?

The structure is 1,456 ft (443.8 m) long with a longest span of 102 ft (31.1 m) and a deck 23 ft wide.

Who owns US 101 N-W Ramp over US 101?

It is owned by the State Highway Agency.