US Bridges

L Road SW over Lat. W61C Blk 81

Good

Grant County, Washington · Adams .4 South of 9 SW · Structure no. 082547000000000

Built
1964
61 years old
Condition
Good
inspected December 2024
Type
Channel Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
1,412
2022 count
Owner
County
County Highway Agency

About this bridge

L Road SW over Lat. W61C Blk 81 is a prestressed concrete channel beam carrying L Road SW over Lat. W61C Blk 81 in Grant County, Washington. It was built in 1964, so it is 61 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 1,412 vehicles a day, roughly 28% of them trucks, projected to reach 1,750 by 2042. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesL Road SW
CrossesLat. W61C Blk 81
LocationAdams .4 South of 9 SW
RouteCounty Highway 91017
Coordinates46.95553, -119.74994
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 protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,412 (2022)
Projected traffic1,750 by 2042
Trucks28%
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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was L Road SW over Lat. W61C Blk 81 built?

It was built in 1964, making it 61 years old in 2025.

What condition is L Road SW over Lat. W61C Blk 81 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 2024.

How much traffic does L Road SW over Lat. W61C Blk 81 carry?

About 1,412 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is L Road SW over Lat. W61C Blk 81?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns L Road SW over Lat. W61C Blk 81?

It is owned by the County Highway Agency.