US Bridges

NW 57th ST over RR Track

Good

King County, Washington · NW 57th Pl & NW 57th ST · Structure no. 085148000000000

Built
1986
39 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
115 ft
3 main spans
Daily traffic
730
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 57th ST over RR Track is a prestressed concrete box beam or girders - multiple carrying NW 57th ST over RR Track in King County, Washington. It was built in 1986, so it is 39 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 730 vehicles a day, roughly 5% of them trucks, projected to reach 830 by 2039. The structure is 115 ft (35.1 m) long and 38 ft wide.

CarriesNW 57th ST
CrossesRR Track
LocationNW 57th Pl & NW 57th ST
RouteCity Street 1140
Coordinates47.67056, -122.40361
Functional classUrban Local

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 inspectionJune 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 alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating23 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span54 ft (16.5 m)
Deck width38 ft (11.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic730 (2019)
Projected traffic830 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW 57th ST over RR Track built?

It was built in 1986, making it 39 years old in 2025.

What condition is NW 57th ST over RR Track 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 June 2023.

How much traffic does NW 57th ST over RR Track carry?

About 730 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is NW 57th ST over RR Track?

The structure is 115 ft (35.1 m) long with a longest span of 54 ft (16.5 m) and a deck 38 ft wide.

Who owns NW 57th ST over RR Track?

It is owned by the City or Municipal Highway Agency.