US Bridges

SR 99 W-S Ramp over Bnrr City Street

Fair

King County, Washington · 0.4 N JCT SR 509 · Structure no. 0014459B0000000

Built
1996
29 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
405 ft
3 main spans
Daily traffic
16,753
2022 count
Owner
State
State Highway Agency

About this bridge

SR 99 W-S Ramp over Bnrr City Street is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 99 W-S Ramp over Bnrr City Street in King County, Washington. It was built in 1996, so it is 29 years old, younger 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 6 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 16,753 vehicles a day, roughly 5% of them trucks, projected to reach 27,536 by 2039. The structure is 405 ft (123.4 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 99 W-S Ramp
CrossesBnrr City Street
Location0.4 N JCT SR 509
RouteState Highway 99
CountyKing County
StateWashington
Coordinates47.54475, -122.3345
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length405 ft (123.4 m)
Longest span135 ft (41.1 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,753 (2022)
Projected traffic27,536 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 99 W-S Ramp over Bnrr City Street built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR 99 W-S Ramp over Bnrr City Street 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 April 2024.

How much traffic does SR 99 W-S Ramp over Bnrr City Street carry?

About 16,753 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is SR 99 W-S Ramp over Bnrr City Street?

The structure is 405 ft (123.4 m) long with a longest span of 135 ft (41.1 m) and a deck 25 ft wide.

Who owns SR 99 W-S Ramp over Bnrr City Street?

It is owned by the State Highway Agency.