US Bridges

11 Road SW over Royal Branch Canal BLK82

Good

Grant County, Washington · 11 SW 0.7 E of K SW · Structure no. 084402000000000

Built
1987
38 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
600
2022 count
Owner
County
County Highway Agency

About this bridge

11 Road SW over Royal Branch Canal BLK82 is a prestressed concrete stringer/multi-beam or girder carrying 11 Road SW over Royal Branch Canal BLK82 in Grant County, Washington. It was built in 1987, so it is 38 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 600 vehicles a day, roughly 27% of them trucks, projected to reach 1,200 by 2042. The structure is 64 ft (19.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries11 Road SW
CrossesRoyal Branch Canal BLK82
Location11 SW 0.7 E of K SW
RouteCounty Highway 91020
CountyGrant County
StateWashington
Coordinates46.92837, -119.71201
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length64 ft (19.5 m)
Longest span63 ft (19.2 m)
Deck width36 ft (11 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2022)
Projected traffic1,200 by 2042
Trucks27%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 11 Road SW over Royal Branch Canal BLK82 built?

It was built in 1987, making it 38 years old in 2025.

What condition is 11 Road SW over Royal Branch Canal BLK82 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 11 Road SW over Royal Branch Canal BLK82 carry?

About 600 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is 11 Road SW over Royal Branch Canal BLK82?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.2 m) and a deck 36 ft wide.

Who owns 11 Road SW over Royal Branch Canal BLK82?

It is owned by the County Highway Agency.