Irr Bia Rte 9 over Navajo River
Rio Arriba County, New Mexico · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 9 over Navajo River in Rio Arriba County, New Mexico, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2023).
- It is one of 88 of the 159 inventoried bridges in Rio Arriba County rated fair (55.3%); 10 (6.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (36.94667, -107.06163)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 121 ft |
| Location | 6.4 Km West of Dulce Nm |
| NBI structure number | 00000000000M317 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Mexico department of transportation.
Busiest bridges in Rio Arriba County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nm-68 NB over Santa Cruz River | 1957 | 19,160 | Poor |
| Nm-68 SB over Santa Cruz River | 1957 | 19,160 | Fair |
| Nm-584 over Rio Grande | 1977 | 17,171 | Fair |
| Nm-68 over Unnamed Waterway | 1956 | 16,476 | Fair |
| Nm-68 over Unnamed Waterway | 1925 | 16,131 | Good |
| Nm-68 SB over Unnamed Waterway | 1956 | 16,131 | Good |
All bridges nearby: Rio Arriba County, NM bridge conditions · every bridge in Rio Arriba County · New Mexico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.