I 17
I 17 in 4.0 MI W JCT I 10, Maricopa County, Arizona received a condition grade of B (67/100). Built in 1961, the bridge carries 126K vehicles daily on I 17 over 19th Avenue.
I 17 carries a B on the BridgeSafety Condition Score with 67/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1961 and is now 65 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I 17 carries an average daily traffic count of 126,081 vehicles, with 6 lane(s) crossing 19th Avenue. 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 17 is a 65-year-old bridge located 4.0 MI W JCT I 10 in Maricopa County, Arizona. The bridge carries I 17 over 19th Avenue with 6 traffic lanes, handling approximately 126K vehicles per day. Built in 1961 and reconstructed in 1984, the structure spans 31.7 meters.
The bridge received a Condition Grade of B (67/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 17 has a Condition Score of 67/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 17 was built in 1961 and reconstructed in 1984, making it 65 years old. The average bridge age in the United States is 48 years.
I 17 carries approximately 126K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 31.7 meters long and located on I 17 in 4.0 MI W JCT I 10, Maricopa County, Arizona.
No, I 17 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 17 is located 4.0 MI W JCT I 10 in Maricopa County, Arizona. The bridge carries I 17 over 19th Avenue. Its coordinates are 33.428900, -112.099700. It is maintained by State Highway Agency.
I 17 carries I 17 over 19th Avenue. The bridge is 31.7 meters long and was built in 1961, with reconstruction in 1984.
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.