Thornydale Road
Carrying Thornydale Road over Carmack Wash
0.25 mi N of Orange Grove, Pima, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Thornydale Road in Pima, Arizona sits above 84% of rated Arizona bridges on inventory load rating (82 t), while its 1983 build year is earlier than 47% of Pima's recorded-year cohort (1,150 bridges).
Thornydale Road in Pima, Arizona is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1983, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure AZ:08726
LATE-CENTURY · CONCRETE · LONG-SPAN-RUN · CULVERT-LED · HEAVY-ADT · HEAVY-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- LONG-SPAN-RUN 10 spans
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: Thornydale Road
The Thornydale Road bridge in Pima, Arizona carries Thornydale Road over Carmack Wash. It was built in 1983, making it 43 years old today. The structure is built primarily of concrete continuous and spans 10 sections, stretching 33.2 meters (109 feet) end to end. Daily traffic averages 33,891 vehicles, placing it in the heavily-trafficked tier of Arizona bridges. It is owned and maintained by Town/Township Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How Thornydale Road compares
Age against the county: built in 1983, earlier than 539 of Pima's 1,150 bridges with a recorded construction year (47%), against a county median build year of 1981. This is one of the newer structures in its county.
Live comparison across Arizona bridges with a recorded inventory load rating (8,572 of 8,573 rated).
Thornydale Road vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
82 Top 16% higher than 84% of 8,572 bridges
rated Arizona bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Pima inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 1,150 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1983
- Material
- Concrete Continuous
- Number of Spans
- 10
- Structure Length
- 33.2 m (109 ft) 0
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 33,891 vehicles/day
- Structure Number
- 08726
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 Thornydale Road 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 Thornydale Road against other structures in Pima 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 Thornydale Road?
Thornydale Road in Pima, Arizona on the FHWA's 0–9 scale.
How often is Thornydale Road inspected?
Thornydale Road'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 33,891 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Thornydale Road is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Thornydale Road?
Thornydale Road has an NBI inventory load rating of 81.6 metric tons.
Who is responsible for maintaining Thornydale Road?
Thornydale Road is owned and maintained by Town/Township Highway Agency.
How old is Thornydale Road and does age affect safety?
Thornydale Road was built in 1983, making it 43 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.