IRR BIA RTE 8
Carrying IRR BIA RTE 8 over AMARGO WASH
SOUTH SIDE OF DULCE NM, Rio Arriba, New Mexico
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: IRR BIA RTE 8
The IRR BIA RTE 8 bridge in Rio Arriba, New Mexico carries IRR BIA RTE 8 over AMARGO WASH. It was built in 1976, making it 50 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 31.4 meters (103 feet) end to end. Daily traffic averages 1,000 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 4/9, superstructure at 5/9, substructure at 5/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 35.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IRR BIA RTE 8 compares
Live comparison across New Mexico.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1976
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 31.4 m (103 ft)
- Deck Width
- 13.1 m (43 ft)
- Owner
- Bureau of Indian Affairs
- Avg Daily Traffic
- 1,000 vehicles/day
- Structure Number
- 00000000000M314
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
IRR BIA RTE 8 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 8 against other structures in Rio Arriba 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 8?
IRR BIA RTE 8 in Rio Arriba, New Mexico has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is IRR BIA RTE 8 inspected?
IRR BIA RTE 8'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 1,000 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 8 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 8?
IRR BIA RTE 8 has an NBI inventory load rating of 35.6 metric tons.
Who is responsible for maintaining IRR BIA RTE 8?
IRR BIA RTE 8 is owned and maintained by Bureau of Indian Affairs.
How old is IRR BIA RTE 8 and does age affect safety?
IRR BIA RTE 8 was built in 1976, making it 50 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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.