I-90 WB
I-90 WB in 0.5 E JCT I-405, King County, Washington received a condition grade of A (89/100). Built in 2024, the bridge carries 139K vehicles daily on I-90 WB over Sunset Creek.
I-90 WB carries an A on the BridgeSafety Condition Score with 89/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 2024 and is 2 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. I-90 WB carries an average daily traffic count of 139,482 vehicles, with 5 lane(s) crossing Sunset Creek. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I-90 WB is a 2-year-old bridge located 0.5 E JCT I-405 in King County, Washington. The bridge carries I-90 WB over Sunset Creek with 5 traffic lanes, handling approximately 139K vehicles per day. Built in 2024, the structure spans 47 meters.
The bridge received a Condition Grade of A (89/100) based on Federal Highway Administration inspection data. Its deck is rated 8/9 (good), superstructure 8/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-90 WB has a Condition Score of 89/100 (Grade A). Its deck is rated 8/9, superstructure 8/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-90 WB was built in 2024, making it 2 years old. The average bridge age in the United States is 48 years.
I-90 WB carries approximately 139K vehicles per day (average daily traffic). The bridge has 5 traffic lanes. It is 47 meters long and located on I-90 WB in 0.5 E JCT I-405, King County, Washington.
No, I-90 WB is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I-90 WB is located 0.5 E JCT I-405 in King County, Washington. The bridge carries I-90 WB over Sunset Creek. Its coordinates are 47.580167, -122.161500. It is maintained by State Highway Agency.
I-90 WB carries I-90 WB over Sunset Creek. The bridge is 47 meters long and was built in 2024.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.