US Bridges

Sand Dunes RD over Moses Lake

Good

Grant County, Washington · Sand Dunes .6 S of Camas · Structure no. 088720000000000

Built
2015
10 years old
Condition
Good
inspected January 2023
Type
Channel Beam
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
412
2021 count
Owner
County
County Highway Agency

About this bridge

Sand Dunes RD over Moses Lake is a prestressed concrete channel beam carrying Sand Dunes RD over Moses Lake in Grant County, Washington. It was built in 2015, so it is 10 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 412 vehicles a day, roughly 39% of them trucks, projected to reach 475 by 2043. The structure is 57 ft (17.4 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesSand Dunes RD
CrossesMoses Lake
LocationSand Dunes .6 S of Camas
RouteCounty Highway 21590
Coordinates47.08389, -119.33306
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 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 rating57.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length57 ft (17.4 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic412 (2021)
Projected traffic475 by 2043
Trucks39%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sand Dunes RD over Moses Lake built?

It was built in 2015, making it 10 years old in 2025.

What condition is Sand Dunes RD over Moses Lake 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 Sand Dunes RD over Moses Lake carry?

About 412 vehicles per day (2021 count), of which roughly 39% are trucks.

How long is Sand Dunes RD over Moses Lake?

The structure is 57 ft (17.4 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns Sand Dunes RD over Moses Lake?

It is owned by the County Highway Agency.