US Bridges

NE 12th ST over Bnrr

Fair

King County, Washington · NE 12th& 118th NE · Structure no. 085473000000000

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
232 ft
3 main spans
Daily traffic
15,309
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

NE 12th ST over Bnrr is a steel continuous stringer/multi-beam or girder carrying NE 12th ST over Bnrr in King County, Washington. It was built in 1970, so it is 55 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.

It carries about 15,309 vehicles a day, roughly 4% of them trucks, projected to reach 19,136 by 2042. The structure is 232 ft (70.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNE 12th ST
CrossesBnrr
LocationNE 12th& 118th NE
RouteCity Street 75
CountyKing County
StateWashington
Coordinates47.62211, -122.18264
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length232 ft (70.7 m)
Longest span107 ft (32.6 m)
Deck width56 ft (17.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,309 (2022)
Projected traffic19,136 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$14.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NE 12th ST over Bnrr built?

It was built in 1970, making it 55 years old in 2025.

What condition is NE 12th ST over Bnrr 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 May 2024.

How much traffic does NE 12th ST over Bnrr carry?

About 15,309 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is NE 12th ST over Bnrr?

The structure is 232 ft (70.7 m) long with a longest span of 107 ft (32.6 m) and a deck 56 ft wide.

Who owns NE 12th ST over Bnrr?

It is owned by the City or Municipal Highway Agency.