US Bridges

24 Road SW over Lat. WB46 Blk 251

Good

Grant County, Washington · 24 SW .6 East of O · Structure no. 084669000000000

Built
1969
56 years old
Condition
Good
inspected January 2024
Type
Channel Beam
Prestressed Concrete
Length
64 ft
2 main spans
Daily traffic
1,976
2020 count
Owner
County
County Highway Agency

About this bridge

24 Road SW over Lat. WB46 Blk 251 is a prestressed concrete channel beam carrying 24 Road SW over Lat. WB46 Blk 251 in Grant County, Washington. It was built in 1969, so it is 56 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.

It carries about 1,976 vehicles a day, roughly 19% of them trucks, projected to reach 3,000 by 2043. The structure is 64 ft (19.5 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries24 Road SW
CrossesLat. WB46 Blk 251
Location24 SW .6 East of O
RouteCounty Highway 91050
Coordinates46.73699, -119.79757
Functional classRural Major 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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
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 rating44.6 US tons
Inventory rating34.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20 + Mod
Structure length64 ft (19.5 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,976 (2020)
Projected traffic3,000 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 24 Road SW over Lat. WB46 Blk 251 built?

It was built in 1969, making it 56 years old in 2025.

What condition is 24 Road SW over Lat. WB46 Blk 251 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 2024.

How much traffic does 24 Road SW over Lat. WB46 Blk 251 carry?

About 1,976 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is 24 Road SW over Lat. WB46 Blk 251?

The structure is 64 ft (19.5 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns 24 Road SW over Lat. WB46 Blk 251?

It is owned by the County Highway Agency.