US Bridges

9 NW over Winchester Ww

FairPosted for load

Grant County, Washington · 9 NW .7 Mile E of K NW · Structure no. 082232000000000

Built
1953
72 years old, rebuilt 1980
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
127 ft
4 main spans
Daily traffic
617
2021 count
Owner
County
County Highway Agency

About this bridge

9 NW over Winchester Ww is a prestressed concrete stringer/multi-beam or girder carrying 9 NW over Winchester Ww in Grant County, Washington. It was built in 1953 and reconstructed in 1980, so it is 72 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 617 vehicles a day, roughly 23% of them trucks, projected to reach 1,200 by 2043. The structure is 127 ft (38.7 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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Carries9 NW
CrossesWinchester Ww
Location9 NW .7 Mile E of K NW
RouteCounty Highway 93020
CountyGrant County
StateWashington
Coordinates47.22018, -119.70788
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.2 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans4
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span32 ft (9.8 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic617 (2021)
Projected traffic1,200 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$4.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 9 NW over Winchester Ww built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1980.

What condition is 9 NW over Winchester Ww in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does 9 NW over Winchester Ww carry?

About 617 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is 9 NW over Winchester Ww?

The structure is 127 ft (38.7 m) long with a longest span of 32 ft (9.8 m) and a deck 28 ft wide.

Who owns 9 NW over Winchester Ww?

It is owned by the County Highway Agency.