US Bridges

Sand Dune Road over Moses Lake Spillway

GoodPosted for load

Grant County, Washington · Moses Lake Spillway · Structure no. 11MC-0013

Built
1962
63 years old
Condition
Good
inspected November 2024
Type
Slab
Concrete Continuous
Length
56 ft
5 main spans
Daily traffic
50
2022 count
Owner
Federal
Bureau of Reclamation

About this bridge

Sand Dune Road over Moses Lake Spillway is a concrete continuous slab carrying Sand Dune Road over Moses Lake Spillway in Grant County, Washington. It was built in 1962, so it is 63 years old, older 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 100 by 2042. The structure is 56 ft (17.1 m) long and 24 ft wide. If it were closed, the detour would be 59.7 mi (96 km).

CarriesSand Dune Road
CrossesMoses Lake Spillway
LocationMoses Lake Spillway
RouteFederal Lands Road 0
Coordinates47.07993, -119.33374
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span10 ft (3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic100 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed59.7 mi (96 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sand Dune Road over Moses Lake Spillway built?

It was built in 1962, making it 63 years old in 2025.

What condition is Sand Dune Road over Moses Lake Spillway 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 2024.

How much traffic does Sand Dune Road over Moses Lake Spillway carry?

About 50 vehicles per day (2022 count).

How long is Sand Dune Road over Moses Lake Spillway?

The structure is 56 ft (17.1 m) long with a longest span of 10 ft (3 m) and a deck 24 ft wide.

Who owns Sand Dune Road over Moses Lake Spillway?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.