Hwy 001
Hwy 001 in 1.7 MI N Multnomah BLVD, Multnomah County, Oregon received a condition grade of A (82/100). Built in 2014, the bridge carries 125K vehicles daily on Hwy 001 over Iowa Street Viaduct.
Hwy 001 carries an A on the BridgeSafety Condition Score with 82/100. 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 2014 and is 12 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. Hwy 001 carries an average daily traffic count of 125,003 vehicles, with 6 lane(s) crossing Iowa Street Viaduct. 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
Hwy 001 is a 12-year-old bridge located 1.7 MI N Multnomah BLVD in Multnomah County, Oregon. The bridge carries Hwy 001 over Iowa Street Viaduct with 6 traffic lanes, handling approximately 125K vehicles per day. Built in 2014, the structure spans 134.1 meters.
The bridge received a Condition Grade of A (82/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
Hwy 001 has a Condition Score of 82/100 (Grade A). Its deck is rated 7/9, superstructure 7/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
Hwy 001 was built in 2014, making it 12 years old. The average bridge age in the United States is 48 years.
Hwy 001 carries approximately 125K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 134.1 meters long and located on Hwy 001 in 1.7 MI N Multnomah BLVD, Multnomah County, Oregon.
No, Hwy 001 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
Hwy 001 is located 1.7 MI N Multnomah BLVD in Multnomah County, Oregon. The bridge carries Hwy 001 over Iowa Street Viaduct. Its coordinates are 45.479986, -122.678919. It is maintained by State Highway Agency.
Hwy 001 carries Hwy 001 over Iowa Street Viaduct. The bridge is 134.1 meters long and was built in 2014.
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.