I 10
I 10 in 0.2 MI W JCT SR 101l, Maricopa County, Arizona received a condition grade of B (78/100). Built in 1981, the bridge carries 191K vehicles daily on I 10 over 99th Avenue.
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 1981, making it 45 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 190,817 vehicles, with 10 lane(s) crossing 99th 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 10 is a 45-year-old bridge located 0.2 MI W JCT SR 101l in Maricopa County, Arizona. The bridge carries I 10 over 99th Avenue with 10 traffic lanes, handling approximately 191K vehicles per day. Built in 1981 and reconstructed in 2009, the structure spans 46.6 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 1981 and reconstructed in 2009, making it 45 years old. The average bridge age in the United States is 48 years.
I 10 carries approximately 191K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 46.6 meters long and located on I 10 in 0.2 MI W JCT SR 101l, 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 0.2 MI W JCT SR 101l in Maricopa County, Arizona. The bridge carries I 10 over 99th Avenue. Its coordinates are 33.461567, -112.272792. It is maintained by State Highway Agency.
I 10 carries I 10 over 99th Avenue. The bridge is 46.6 meters long and was built in 1981, with reconstruction in 2009.
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.