US Bridges

16th Ave SW over Klickitat Ave SW RR

Good

King County, Washington · 16th Ave SW & Klickitat · Structure no. 087211000000000

Built
2001
24 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,084 ft
7 main spans
Daily traffic
9,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

16th Ave SW over Klickitat Ave SW RR is a steel stringer/multi-beam or girder carrying 16th Ave SW over Klickitat Ave SW RR in King County, Washington. It was built in 2001, so it is 24 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 9,000 vehicles a day, roughly 50% of them trucks, projected to reach 12,000 by 2041. The structure is 1,084 ft (330.4 m) long and 46 ft wide.

Location

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Carries16th Ave SW
CrossesKlickitat Ave SW RR
Location16th Ave SW & Klickitat
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.57528, -122.35556
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length1,084 ft (330.4 m)
Longest span137 ft (41.8 m)
Deck width46 ft (13.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2023)
Projected traffic12,000 by 2041
Trucks50%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byPrivate (other than railroad)
Historic statusHistorical significance not determinable at this time
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$20.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 16th Ave SW over Klickitat Ave SW RR built?

It was built in 2001, making it 24 years old in 2025.

What condition is 16th Ave SW over Klickitat Ave SW RR 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 September 2023.

How much traffic does 16th Ave SW over Klickitat Ave SW RR carry?

About 9,000 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is 16th Ave SW over Klickitat Ave SW RR?

The structure is 1,084 ft (330.4 m) long with a longest span of 137 ft (41.8 m) and a deck 46 ft wide.

Who owns 16th Ave SW over Klickitat Ave SW RR?

It is owned by the City or Municipal Highway Agency and maintained by the Private (other than railroad).