Irr/us-491-nbl over Pena Blanca Arroyo
San Juan County, New Mexico · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr/us-491-nbl over Pena Blanca Arroyo in San Juan County, New Mexico, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2010, making it 15 years old at the 2025 inventory.
- It carries about 6,055 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 60 of the 174 inventoried bridges in San Juan County rated good (34.5%); 10 (5.7%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (36.35922, -108.72044)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 130 ft |
| Location | 1.86 M N Road to Toadlena |
| NBI structure number | 000000000009339 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Mexico department of transportation.
Busiest bridges in San Juan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nm-516 over Unnamed Waterway | 1937 | 37,626 | Fair |
| Nm-516 over Unnamed Waterway | 1937 | 29,593 | Fair |
| Nm-516 over Unnamed Waterway | 1937 | 22,275 | Fair |
| Nm-516 over Unnamed Waterway | 1937 | 22,275 | Fair |
| Nm-516 over Unnamed Waterway | 1937 | 22,275 | Fair |
| US-64 Ebl/wbl over Unnamed Waterway | 1964 | 21,685 | Good |
All bridges nearby: San Juan County, NM bridge conditions · every bridge in San Juan County · New Mexico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.