US Bridges

Devonshire RD over Higgins Slough

Good

Grays Harbor County, Washington · 4.3 E JCT SR 12 · Structure no. 082097000000000

Built
1977
48 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
134 ft
5 main spans
Daily traffic
351
2023 count
Owner
County
County Highway Agency

About this bridge

Devonshire RD over Higgins Slough is a concrete continuous slab carrying Devonshire RD over Higgins Slough in Grays Harbor County, Washington. It was built in 1977, so it is 48 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 351 vehicles a day, roughly 1% of them trucks, projected to reach 428 by 2043. The structure is 134 ft (40.7 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesDevonshire RD
CrossesHiggins Slough
Location4.3 E JCT SR 12
RouteCounty Highway 52943
CountyGrays Harbor County
StateWashington
Coordinates46.96222, -123.67853
Functional classUrban 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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating93 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length134 ft (40.7 m)
Longest span29 ft (8.8 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic351 (2023)
Projected traffic428 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$5.2 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Devonshire RD over Higgins Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is Devonshire RD over Higgins Slough 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 November 2023.

How much traffic does Devonshire RD over Higgins Slough carry?

About 351 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Devonshire RD over Higgins Slough?

The structure is 134 ft (40.7 m) long with a longest span of 29 ft (8.8 m) and a deck 27 ft wide.

Who owns Devonshire RD over Higgins Slough?

It is owned by the County Highway Agency.