WB On & Off Ramps
Carrying WB On & Off Ramps over Canal
1.0 mi N Jct I-8, Pinal, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
WB On & Off Ramps in Pinal, Arizona sits above 44% of rated Arizona bridges on inventory load rating (37 t), while its 1963 build year is earlier than 62% of Pinal's recorded-year cohort (716 bridges).
WB On & Off Ramps in Pinal, Arizona is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1963, 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:06340
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · HEAVY-ADT · STANDARD-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard 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: WB On & Off Ramps
The WB On & Off Ramps bridge in Pinal, Arizona carries WB On & Off Ramps over Canal. It was built in 1963, making it 63 years old today. The structure is built primarily of concrete continuous and spans 2 sections, stretching 7.9 meters (26 feet) end to end. Daily traffic averages 10,000 vehicles, placing it in the moderately-trafficked tier of Arizona bridges. It is owned and maintained by State 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 WB On & Off Ramps compares
Age against the county: built in 1963, earlier than 444 of Pinal's 716 bridges with a recorded construction year (62%), against a county median build year of 1966. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Arizona bridges with a recorded inventory load rating (8,572 of 8,573 rated).
WB On & Off Ramps vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
37 Top 56% higher than 44% 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.
Pinal inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 716 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
- 1963
- Material
- Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 7.9 m (26 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 10,000 vehicles/day
- Structure Number
- 06340
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 WB On & Off Ramps 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 WB On & Off Ramps 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 WB On & Off Ramps?
WB On & Off Ramps in Pinal, Arizona on the FHWA's 0–9 scale.
How often is WB On & Off Ramps inspected?
WB On & Off Ramps'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 10,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. WB On & Off Ramps 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 WB On & Off Ramps?
WB On & Off Ramps has an NBI inventory load rating of 37.2 metric tons.
Who is responsible for maintaining WB On & Off Ramps?
WB On & Off Ramps is owned and maintained by State Highway Agency.
How old is WB On & Off Ramps and does age affect safety?
WB On & Off Ramps was built in 1963, making it 63 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.