Bridge conditions in San Miguel County, New Mexico
175 inventoried bridges · 14 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
San Miguel County tracks close to typical: 14 of its 175 inventoried bridges (8.0%) are rated poor, against a national rate of about 7%.
- 14 of the 175 bridges in San Miguel County, New Mexico, are rated in poor condition (8.0%) in the 2025 National Bridge Inventory, as of .
- 68 bridges (38.9%) are rated good and 93 (53.1%) fair.
- The median San Miguel County bridge was built in 1974.
- The busiest poor-rated bridge is US-84 over I-25 Nbl/sbl (built 1966), carrying about 2,467 vehicles a day.
Good 38.9% · Fair 53.1% · Poor 8.0% of 175 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-84 over I-25 Nbl/sbl | 1966 | 2,467 | Poor |
| Nm-94 over Manuelitas Creek | 1954 | 1,707 | Poor |
| Nm-63 over Pecos River | 1981 | 595 | Poor |
| Fr-2135 over Tecolote Creek | 1941 | 254 | Poor |
| Nm-104 over La Manga Creek | 1952 | 243 | Poor |
| Nm-104 over Oso Creek | 1952 | 243 | Poor |
| Nm-104 over Alamosa Creek | 1952 | 243 | Poor |
| Nm-104 over Unnamed Waterway | 1952 | 243 | Poor |
| Nm-386 over Unnamed Waterway | 1976 | 238 | Poor |
| Nm-104 over Unnamed Waterway | 1966 | 230 | Poor |
| 47-a19a over Tecolote Creek | 1974 | 210 | Poor |
| Nm-104 over La Manga Creek | 1965 | 181 | Poor |
| Nm-104 over Unnamed Waterway | 1959 | 151 | Poor |
| Nm-266 over Sapello River | 1967 | 74 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mills AVE. (LV) over Gallinas River | 1998 | 14,679 | Good |
| I-25 Nbl over Agua Sarca Creek | 1973 | 12,084 | Fair |
| I-25 Sbl over Agua Sarca Creek | 1973 | 12,084 | Fair |
| I-25 Nbl/sbl/frntg over Unnamed Waterway | 1966 | 12,084 | Fair |
| I-25 Nbl/sbl over Unnamed Waterway | 1973 | 12,084 | Good |
| I-25 Nbl over I-25 Service Road | 1966 | 10,978 | Fair |
| I-25 NB over Pecos River | 1966 | 10,100 | Fair |
| I-25 SB over Pecos River | 1966 | 10,100 | Fair |
| I-25 Nbl/sbl over Local Road | 1966 | 10,100 | Good |
| I-25 NB over Nm-63 | 1964 | 9,553 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of New Mexico: New Mexico bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.