12th to 29th Ramp
Carrying 12th to 29th Ramp over I-10
Jct I-10 & I-19, Pima, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
12th to 29th Ramp in Pima, Arizona sits above 64% of rated Arizona bridges on inventory load rating (44 t), while its 2003 build year is earlier than 17% of Pima's recorded-year cohort (1,150 bridges).
12th to 29th Ramp in Pima, Arizona is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2003, it carries 3 rated components 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:02603
POST-2000 · PRESTRESS · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial 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: 12th to 29th Ramp
The 12th to 29th Ramp bridge in Pima, Arizona carries 12th to 29th Ramp over I-10. It was built in 2003, making it 23 years old today. The structure is built primarily of prestressed concrete continuous and spans 4 sections, stretching 182.3 meters (598 feet) end to end. Daily traffic averages 7,067 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 a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How 12th to 29th Ramp compares
Age against the county: built in 2003, earlier than 190 of Pima's 1,150 bridges with a recorded construction year (17%), 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).
12th to 29th Ramp vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
44 Top 36% higher than 64% 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.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
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
- 2003
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 4
- Structure Length
- 182.3 m (598 ft)
- Deck Width
- 8.8 m (29 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 7,067 vehicles/day
- Structure Number
- 02603
Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
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 12th to 29th Ramp 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 12th to 29th Ramp 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 12th to 29th Ramp?
12th to 29th Ramp in Pima, Arizona has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is 12th to 29th Ramp inspected?
12th to 29th Ramp'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 7,067 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 12th to 29th Ramp 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 12th to 29th Ramp?
12th to 29th Ramp has an NBI inventory load rating of 43.5 metric tons.
Who is responsible for maintaining 12th to 29th Ramp?
12th to 29th Ramp is owned and maintained by State Highway Agency.
How old is 12th to 29th Ramp and does age affect safety?
12th to 29th Ramp was built in 2003, making it 23 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.