US Bridges

D Road SE over Irrigation Canal

Good

Grant County, Washington · D SE .9 Mile S of 13 SE · Structure no. 087989000000000

Built
2009
16 years old
Condition
Good
inspected December 2023
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
391
2020 count
Owner
County
County Highway Agency

About this bridge

D Road SE over Irrigation Canal is a prestressed concrete slab carrying D Road SE over Irrigation Canal in Grant County, Washington. It was built in 2009, so it is 16 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 391 vehicles a day, roughly 26% of them trucks, projected to reach 475 by 2040. The structure is 37 ft (11.3 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesD Road SE
CrossesIrrigation Canal
LocationD SE .9 Mile S of 13 SE
RouteCounty Highway 20670
CountyGrant County
StateWashington
Coordinates46.88381, -119.41083
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length37 ft (11.3 m)
Longest span34 ft (10.4 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic391 (2020)
Projected traffic475 by 2040
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was D Road SE over Irrigation Canal built?

It was built in 2009, making it 16 years old in 2025.

What condition is D Road SE over Irrigation Canal 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 December 2023.

How much traffic does D Road SE over Irrigation Canal carry?

About 391 vehicles per day (2020 count), of which roughly 26% are trucks.

How long is D Road SE over Irrigation Canal?

The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 36 ft wide.

Who owns D Road SE over Irrigation Canal?

It is owned by the County Highway Agency.