Irr Bia Rte 402 over Don Juan River
Santa Fe County, New Mexico · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 402 over Don Juan River in Santa Fe County, New Mexico, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 300 vehicles a day (traffic count year 2023).
- It is one of 144 of the 255 inventoried bridges in Santa Fe County rated fair (56.5%); 5 (2.0%) 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 → (35.8842, -106.12243)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 40 ft |
| Location | .8 Km SW Ildefonso Pueblo |
| NBI structure number | 00000000000M211 |
| 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) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Mexico department of transportation.
Busiest bridges in Santa Fe County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr/us-84/285 over Unnamed Waterway | 1959 | 72,062 | Fair |
| IRR/US84/285/ Fr over Unnamed Waterway | 1959 | 72,062 | Fair |
| Irr/us-84/285 over Unnamed Waterway | 1959 | 72,062 | Fair |
| US-84/285 over Tesuque Pueblo Road | 2004 | 72,062 | Good |
| US-84/285 Nbl over Arroyo Chamisos | 1973 | 42,473 | Fair |
| US-84/285 Sbl over Arroyo Chamisos | 1973 | 42,473 | Fair |
All bridges nearby: Santa Fe County, NM bridge conditions · every bridge in Santa Fe County · New Mexico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.