I-17
I-17 in 7.3 M South Of SR 74, Maricopa County, Arizona received a condition grade of F (0/100). Built in 2009, the bridge carries 136K vehicles daily on I-17 over Scatter Wash North. It is classified as structurally deficient.
I-17 carries an F on the BridgeSafety Condition Score with 0/100 — the bottom tier of the FHWA NBI distribution. Component ratings flag the structure for near-term rehabilitation or replacement; the bridge may remain open to traffic but is on the priority list for action.
The bridge was built in 2009 and is 17 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. I-17 carries an average daily traffic count of 135,704 vehicles, with 17 lane(s) crossing Scatter Wash North. 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 17-year-old bridge located 7.3 M South Of SR 74 in Maricopa County, Arizona. The bridge carries I-17 over Scatter Wash North with 17 traffic lanes, handling approximately 136K vehicles per day. Built in 2009, the structure spans 12.2 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-17 has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
I-17 was built in 2009, making it 17 years old. The average bridge age in the United States is 48 years.
I-17 carries approximately 136K vehicles per day (average daily traffic). The bridge has 17 traffic lanes. It is 12.2 meters long and located on I-17 in 7.3 M South Of SR 74, Maricopa County, Arizona.
Yes, I-17 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I-17 is located 7.3 M South Of SR 74 in Maricopa County, Arizona. The bridge carries I-17 over Scatter Wash North. Its coordinates are 33.702778, -112.122222. It is maintained by State Highway Agency.
I-17 carries I-17 over Scatter Wash North. The bridge is 12.2 meters long and was built 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.