Bridge conditions in San Juan County, Colorado
12 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 12 bridges the federal inventory lists in San Juan County are rated poor; the rest split 4 good and 7 fair.
- 1 of the 12 bridges in San Juan County, Colorado, are rated in poor condition (8.3%) in the 2025 National Bridge Inventory, as of .
- 4 bridges (33.3%) are rated good and 7 (58.3%) fair.
- The median San Juan County bridge was built in 1992.
- The busiest poor-rated bridge is Greene Street over Cement Creek (built 1929), carrying about 647 vehicles a day.
Good 33.3% · Fair 58.3% · Poor 8.3% of 12 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 |
|---|---|---|---|
| Greene Street over Cement Creek | 1929 | 647 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 550 Ml over Mineral Creek | 2011 | 1,900 | Good |
| US 550 Ml over Cascade Creek | 1949 | 1,900 | Fair |
| County Road 2 over Cunningham Creek | 1989 | 997 | Fair |
| County Road 2 over Animas River | 1988 | 920 | Fair |
| Greene Street over Cement Creek | 1929 | 647 | Poor |
| 14TH Street over Cement Creek | 1993 | 647 | Fair |
| 14TH Street over Animas River | 1992 | 265 | Fair |
| County Road 8 over Mineral Creek | 1993 | 199 | Good |
| County Road 2 over Animas River | 1992 | 178 | Fair |
| County Road 21 over Animas River | 1989 | 81 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Colorado: Colorado 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.