US Bridges

W Garfield ST Ramp over 16th Ave W

Fair

King County, Washington · W Garfield ST & 23rd Ave · Structure no. 085947000000000

Built
1991
34 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
395 ft
13 main spans
Daily traffic
4,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W Garfield ST Ramp over 16th Ave W is a prestressed concrete slab carrying W Garfield ST Ramp over 16th Ave W in King County, Washington. It was built in 1991, so it is 34 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 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 5,800 by 242. The structure is 395 ft (120.4 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesW Garfield ST Ramp
Crosses16th Ave W
LocationW Garfield ST & 23rd Ave
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.63338, -122.38426
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating62.9 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans13
Design loadHS 20
Structure length395 ft (120.4 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2022)
Projected traffic5,800 by 242
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

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$10 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W Garfield ST Ramp over 16th Ave W built?

It was built in 1991, making it 34 years old in 2025.

What condition is W Garfield ST Ramp over 16th Ave W 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 2023.

How much traffic does W Garfield ST Ramp over 16th Ave W carry?

About 4,000 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is W Garfield ST Ramp over 16th Ave W?

The structure is 395 ft (120.4 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns W Garfield ST Ramp over 16th Ave W?

It is owned by the City or Municipal Highway Agency.