IRR - SL101
IRR - SL101 in 4.5 MI N Of JCT US 60, Maricopa County, Arizona received a condition grade of B (78/100). Built in 1992, the bridge carries 212K vehicles daily on IRR - SL101 over Mckellips Road.
IRR - SL101 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 1992, making it 34 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. IRR - SL101 carries an average daily traffic count of 212,392 vehicles, with 11 lane(s) crossing Mckellips Road. 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
IRR - SL101 is a 34-year-old bridge located 4.5 MI N Of JCT US 60 in Maricopa County, Arizona. The bridge carries IRR - SL101 over Mckellips Road with 11 traffic lanes, handling approximately 212K vehicles per day. Built in 1992 and reconstructed in 2015, the structure spans 50.3 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
IRR - SL101 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.
IRR - SL101 was built in 1992 and reconstructed in 2015, making it 34 years old. The average bridge age in the United States is 48 years.
IRR - SL101 carries approximately 212K vehicles per day (average daily traffic). The bridge has 11 traffic lanes. It is 50.3 meters long and located on IRR - SL101 in 4.5 MI N Of JCT US 60, Maricopa County, Arizona.
No, IRR - SL101 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IRR - SL101 is located 4.5 MI N Of JCT US 60 in Maricopa County, Arizona. The bridge carries IRR - SL101 over Mckellips Road. Its coordinates are 33.451500, -111.890300. It is maintained by State Highway Agency.
IRR - SL101 carries IRR - SL101 over Mckellips Road. The bridge is 50.3 meters long and was built in 1992, with reconstruction in 2015.
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.