IRR/US-491
Carrying IRR/US-491 over UNNAMED WATERWAY
7.6 MI N OF TOHATCHI, McKinley, New Mexico
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR/US-491 in McKinley, New Mexico sits above 96% of rated New Mexico bridges on inventory load rating (50 t), while its 2018 build year is earlier than 2% of McKinley's recorded-year cohort (289 bridges).
IRR/US-491 in McKinley, New Mexico is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2018, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 8. 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 NM:000000000009801
POST-2000 · CONCRETE · MULTI-SPAN · CULVERT-LED · ARTERIAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- 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: IRR/US-491
The IRR/US-491 bridge in McKinley, New Mexico carries IRR/US-491 over UNNAMED WATERWAY. It was built in 2018, making it 8 years old today. The structure is built primarily of concrete and spans 3 sections, stretching 9.8 meters (32 feet) end to end. Daily traffic averages 5,746 vehicles, placing it in the moderately-trafficked tier of New Mexico bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 8/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How IRR/US-491 compares
Age against the county: built in 2018, earlier than 5 of McKinley's 289 bridges with a recorded construction year (2%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across New Mexico bridges with a recorded inventory load rating (4,030 of 4,035 rated).
IRR/US-491 vs every rated New Mexico bridge
Inventory load rating (metric tons), FHWA NBI, this state
50 Top 4% higher than 96% of 4,030 bridges
rated New Mexico 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.
McKinley inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 289 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
- 2018
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 9.8 m (32 ft)
- Deck Width
- 39.9 m (131 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 5,746 vehicles/day
- Structure Number
- 000000000009801
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/US-491 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/US-491 against other structures in McKinley and across New Mexico. New Mexico 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/US-491?
IRR/US-491 in McKinley, New Mexico on the FHWA's 0–9 scale.
How often is IRR/US-491 inspected?
IRR/US-491'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 5,746 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR/US-491 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 IRR/US-491?
IRR/US-491 has an NBI inventory load rating of 50.3 metric tons.
Who is responsible for maintaining IRR/US-491?
IRR/US-491 is owned and maintained by State Highway Agency.
How old is IRR/US-491 and does age affect safety?
IRR/US-491 was built in 2018, making it 8 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.