US Bridges

Quinault S Shore over Storm Branch

Good

Grays Harbor County, Washington · 7.7 NE JCT US 101 · Structure no. 079758000000000

Built
1982
43 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
199
2020 count
Owner
County
County Highway Agency

About this bridge

Quinault S Shore over Storm Branch is a prestressed concrete slab carrying Quinault S Shore over Storm Branch in Grays Harbor County, Washington. It was built in 1982, so it is 43 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 199 vehicles a day, roughly 1% of them trucks, projected to reach 243 by 2040. The structure is 29 ft (8.8 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesQuinault S Shore
CrossesStorm Branch
Location7.7 NE JCT US 101
RouteCounty Highway 93400
Coordinates47.51444, -123.77389
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.4 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.4 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic199 (2020)
Projected traffic243 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Quinault S Shore over Storm Branch built?

It was built in 1982, making it 43 years old in 2025.

What condition is Quinault S Shore over Storm Branch 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 March 2024.

How much traffic does Quinault S Shore over Storm Branch carry?

About 199 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Quinault S Shore over Storm Branch?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.4 m) and a deck 30 ft wide.

Who owns Quinault S Shore over Storm Branch?

It is owned by the County Highway Agency.