IRR BIA RTE N321
Carrying IRR BIA RTE N321 over CRYSTAL CREEK
IN CRYSTAL NEW MEXICO, San Juan, New Mexico
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR BIA RTE N321 in San Juan, New Mexico sits above 4% of rated New Mexico bridges on inventory load rating (21 t), while its 1940 build year is earlier than 91% of San Juan's recorded-year cohort (174 bridges).
IRR BIA RTE N321 in San Juan, New Mexico is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1940, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 2. The lowest applicable rating sets the federal condition category, so this Poor 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:00000000000N616
PRE-1950 · TIMBER · LONG-SPAN-RUN · TIED-CTRL · LOCAL-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- TIMBER Wood or timber
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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 N321
The IRR BIA RTE N321 bridge in San Juan, New Mexico carries IRR BIA RTE N321 over CRYSTAL CREEK. It was built in 1940, making it 86 years old today. The structure is built primarily of wood or timber and spans 4 sections, stretching 26.2 meters (86 feet) end to end. Daily traffic averages 254 vehicles, placing it in the lower-traffic tier of New Mexico bridges. It is owned and maintained by Bureau of Indian Affairs.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 2/9, substructure at 2/9. The weakest component sits in critical condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How IRR BIA RTE N321 compares
Age against the county: built in 1940, earlier than 158 of San Juan's 174 bridges with a recorded construction year (91%), against a county median build year of 1977. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across New Mexico bridges with a recorded inventory load rating (4,030 of 4,035 rated).
IRR BIA RTE N321 vs every rated New Mexico bridge
Inventory load rating (metric tons), FHWA NBI, this state
21 Top 96% higher than 4% 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.
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.
San Juan inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 174 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
- 1940
- Material
- Wood or Timber
- Number of Spans
- 4
- Structure Length
- 26.2 m (86 ft)
- Deck Width
- 5.5 m (18 ft)
- Owner
- Bureau of Indian Affairs
- Avg Daily Traffic
- 254 vehicles/day
- Structure Number
- 00000000000N616
Condition Analysis
- • The deck (driving surface) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates critical at 2/9, with severe deterioration on the latest inspection.
- • The substructure (piers and abutments) rates critical at 2/9, with severe deterioration on the latest inspection.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
IRR BIA RTE N321 is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare IRR BIA RTE N321 against other structures in San Juan 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 BIA RTE N321?
IRR BIA RTE N321 in San Juan, New Mexico has a deck rating of 5/9, superstructure rating of 2/9, and substructure rating of 2/9 on the FHWA's 0–9 scale.
How often is IRR BIA RTE N321 inspected?
IRR BIA RTE N321'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 254 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 N321 is currently shown as Poor 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 N321?
IRR BIA RTE N321 has an NBI inventory load rating of 20.6 metric tons.
Who is responsible for maintaining IRR BIA RTE N321?
IRR BIA RTE N321 is owned and maintained by Bureau of Indian Affairs.
How old is IRR BIA RTE N321 and does age affect safety?
IRR BIA RTE N321 was built in 1940, making it 86 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.
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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.