339th Avenue
Carrying 339th Avenue over I 10
9.31 mi West of Jct SR 85, Maricopa, Arizona
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 339th Avenue
The 339th Avenue bridge in Maricopa, Arizona carries 339th Avenue over I 10. It was built in 1974, making it 52 years old today. The structure is built primarily of concrete continuous. Daily traffic averages 27,321 vehicles, placing it in the heavily-trafficked tier of Arizona bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. All reported major components score above the Poor range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 339th Avenue compares
Live comparison across Arizona.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1974
- Material
- Concrete Continuous
- Avg Daily Traffic
- 27,321 vehicles/day
- Structure Number
- 01644
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether 339th Avenue is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare 339th Avenue against other structures in Maricopa and across Arizona. Arizona bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for 339th Avenue?
339th Avenue in Maricopa, Arizona on the FHWA's 0–9 scale.
How often is 339th Avenue inspected?
339th Avenue's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 27,321 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 339th Avenue is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for 339th Avenue?
An inventory load rating is not recorded for 339th Avenue.
Who is responsible for maintaining 339th Avenue?
Ownership is not specified for 339th Avenue in the NBI.
How old is 339th Avenue and does age affect safety?
339th Avenue was built in 1974, making it 52 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.