US Bridges

Harp Road over Garrard Creek

Good

Grays Harbor County, Washington · 0.2 SE JCT Garrard CR RD · Structure no. 087781000000000

Built
2008
17 years old
Condition
Good
inspected January 2023
Type
Slab
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
113
2021 count
Owner
County
County Highway Agency

About this bridge

Harp Road over Garrard Creek is a prestressed concrete slab carrying Harp Road over Garrard Creek in Grays Harbor County, Washington. It was built in 2008, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 113 vehicles a day, roughly 5% of them trucks, projected to reach 138 by 2041. The structure is 74 ft (22.6 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesHarp Road
CrossesGarrard Creek
Location0.2 SE JCT Garrard CR RD
RouteCounty Highway 69030
Coordinates46.80889, -123.27222
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating46 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length74 ft (22.6 m)
Longest span71 ft (21.6 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2021)
Projected traffic138 by 2041
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Harp Road over Garrard Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Harp Road over Garrard 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 January 2023.

How much traffic does Harp Road over Garrard Creek carry?

About 113 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Harp Road over Garrard Creek?

The structure is 74 ft (22.6 m) long with a longest span of 71 ft (21.6 m) and a deck 32 ft wide.

Who owns Harp Road over Garrard Creek?

It is owned by the County Highway Agency.