Selma Highway
Carrying Selma Highway over Casa Grande Canal Ext
0.1 mi E Jct SR 87, Pinal, Arizona
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Selma Highway
The Selma Highway bridge in Pinal, Arizona carries Selma Highway over Casa Grande Canal Ext. It was built in 1900, making it 126 years old today. The structure is built primarily of wood or timber and spans 2 sections, stretching 9.8 meters (32 feet) end to end. Daily traffic averages 450 vehicles, placing it in the lower-traffic tier of Arizona bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 4/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 20.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Selma Highway 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 How the historical reference is calculated.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
- 1900
- Material
- Wood or Timber
- Number of Spans
- 2
- Structure Length
- 9.8 m (32 ft)
- Deck Width
- 6.9 m (23 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 450 vehicles/day
- Structure Number
- 08436
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • At 4/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear flagged for priority repair.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
How to read this record
Selma Highway is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare Selma Highway against other structures in Pinal 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 Selma Highway?
Selma Highway in Pinal, Arizona has a deck rating of 6/9, superstructure rating of 4/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is Selma Highway inspected?
Selma Highway'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 450 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Selma Highway is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Selma Highway?
Selma Highway has an NBI inventory load rating of 20.0 metric tons.
Who is responsible for maintaining Selma Highway?
Selma Highway is owned and maintained by City/Municipal Highway Agency.
How old is Selma Highway and does age affect safety?
Selma Highway was built in 1900, making it 126 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.