I 10
I 10 in 21.5 MI W JCT I 10/I 17, Maricopa County, Arizona received a condition grade of B (78/100). Built in 1978, the bridge carries 152K vehicles daily on I 10 over Bullard AVE Op.
I 10 carries a B on the BridgeSafety Condition Score with 78/100. 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 1978, making it 48 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. I 10 carries an average daily traffic count of 151,675 vehicles, with 10 lane(s) crossing Bullard AVE Op. 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 10 is a 48-year-old bridge located 21.5 MI W JCT I 10/I 17 in Maricopa County, Arizona. The bridge carries I 10 over Bullard AVE Op with 10 traffic lanes, handling approximately 152K vehicles per day. Built in 1978 and reconstructed in 2011, the structure spans 43 meters.
The bridge received a Condition Grade of B (78/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 10 has a Condition Score of 78/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 10 was built in 1978 and reconstructed in 2011, making it 48 years old. The average bridge age in the United States is 48 years.
I 10 carries approximately 152K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 43 meters long and located on I 10 in 21.5 MI W JCT I 10/I 17, Maricopa County, Arizona.
No, I 10 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 10 is located 21.5 MI W JCT I 10/I 17 in Maricopa County, Arizona. The bridge carries I 10 over Bullard AVE Op. Its coordinates are 33.460400, -112.375800. It is maintained by State Highway Agency.
I 10 carries I 10 over Bullard AVE Op. The bridge is 43 meters long and was built in 1978, with reconstruction in 2011.
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.