US Bridges

1st Avenue Ramp over S Spokane ST

Good

King County, Washington · 1st Ave S at S Spokane ST · Structure no. 089307000000000

Built
2014
11 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
288 ft
2 main spans
Daily traffic
2,030
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st Avenue Ramp over S Spokane ST is a steel stringer/multi-beam or girder carrying 1st Avenue Ramp over S Spokane ST in King County, Washington. It was built in 2014, so it is 11 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 2,030 vehicles a day, roughly 10% of them trucks, projected to reach 32,500 by 2040. The structure is 288 ft (87.8 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries1st Avenue Ramp
CrossesS Spokane ST
Location1st Ave S at S Spokane ST
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.57172, -122.33356
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.9 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+5 approach)
Design loadHS 25 or greater
Structure length288 ft (87.8 m)
Longest span48 ft (14.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,030 (2020)
Projected traffic32,500 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$3.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 1st Avenue Ramp over S Spokane ST built?

It was built in 2014, making it 11 years old in 2025.

What condition is 1st Avenue Ramp over S Spokane ST 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 February 2024.

How much traffic does 1st Avenue Ramp over S Spokane ST carry?

About 2,030 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is 1st Avenue Ramp over S Spokane ST?

The structure is 288 ft (87.8 m) long with a longest span of 48 ft (14.6 m) and a deck 30 ft wide.

Who owns 1st Avenue Ramp over S Spokane ST?

It is owned by the City or Municipal Highway Agency.