IRR BIA RTE N15
Carrying IRR BIA RTE N15 over WHE YOL DA SAH WASH
EAST OF BIRD SPRINGS, Navajo, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR BIA RTE N15 in Navajo, Arizona sits above 38% of rated Arizona bridges on inventory load rating (35 t), while its 1985 build year is earlier than 22% of Navajo's recorded-year cohort (277 bridges).
IRR BIA RTE N15 in Navajo, Arizona is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1985, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair 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:00000000000N662
LATE-CENTURY · PRESTRESS · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
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: IRR BIA RTE N15
The IRR BIA RTE N15 bridge in Navajo, Arizona carries IRR BIA RTE N15 over WHE YOL DA SAH WASH. It was built in 1985, making it 41 years old today. The structure is built primarily of prestressed concrete and spans 4 sections, stretching 74.0 meters (243 feet) end to end. Daily traffic averages 1,075 vehicles, placing it in the moderately-trafficked tier of Arizona bridges. It is owned and maintained by Bureau of Indian Affairs.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How IRR BIA RTE N15 compares
Age against the county: built in 1985, earlier than 61 of Navajo's 277 bridges with a recorded construction year (22%), against a county median build year of 1972. 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).
IRR BIA RTE N15 vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
35 Top 62% higher than 38% 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.
Navajo inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 277 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
- 1985
- Material
- Prestressed Concrete
- Number of Spans
- 4
- Structure Length
- 74.0 m (243 ft)
- Deck Width
- 10.1 m (33 ft)
- Owner
- Bureau of Indian Affairs
- Avg Daily Traffic
- 1,075 vehicles/day
- Structure Number
- 00000000000N662
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
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 IRR BIA RTE N15 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 IRR BIA RTE N15 against other structures in Navajo 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 IRR BIA RTE N15?
IRR BIA RTE N15 in Navajo, Arizona has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is IRR BIA RTE N15 inspected?
IRR BIA RTE N15'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 1,075 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR BIA RTE N15 is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IRR BIA RTE N15?
IRR BIA RTE N15 has an NBI inventory load rating of 35.4 metric tons.
Who is responsible for maintaining IRR BIA RTE N15?
IRR BIA RTE N15 is owned and maintained by Bureau of Indian Affairs.
How old is IRR BIA RTE N15 and does age affect safety?
IRR BIA RTE N15 was built in 1985, making it 41 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.