Nm-304 over San Juan Main Canal
Valencia County, New Mexico · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nm-304 over San Juan Main Canal in Valencia County, New Mexico, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1951, making it 74 years old at the 2025 inventory.
- It carries about 2,104 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 2 of the 48 inventoried bridges in Valencia County rated poor (4.2%); 2 (4.2%) 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 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (34.53614, -106.76064)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 51 ft |
| Location | 8.4 Mi S of Jct Nm-47 |
| NBI structure number | 000000000005234 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| 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 Valencia County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-25 Nbl/sbl over Ranch Road | 1971 | 34,538 | Fair |
| Nm-6 over Belen Highline Canal | 1996 | 27,050 | Good |
| Nm-6 over Rio Grand River | 2022 | 25,000 | Good |
| I-25 Nbl/sbl over Unnamed Waterway | 1969 | 24,409 | Good |
| I-25 Nbl/sbl over Unnamed Waterway | 1969 | 24,409 | Good |
| I-25 Nbl/sbl over Unnamed Waterway | 1969 | 24,409 | Fair |
All bridges nearby: Valencia County, NM bridge conditions · every bridge in Valencia County · New Mexico bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.