Bridge conditions in La Paz County, Arizona
306 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 306 bridges in La Paz County: 192 rated good, 104 fair, and 10 poor.
- 10 of the 306 bridges in La Paz County, Arizona, are rated in poor condition (3.3%) in the 2025 National Bridge Inventory, as of .
- 192 bridges (62.7%) are rated good and 104 (34.0%) fair.
- The median La Paz County bridge was built in 1967.
- The busiest poor-rated bridge is Irr Bia Rte 1 over Main Drain (built 1962), carrying about 3,000 vehicles a day.
Good 62.7% · Fair 34.0% · Poor 3.3% of 306 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 |
|---|---|---|---|
| Irr Bia Rte 1 over Main Drain | 1962 | 3,000 | Poor |
| US 60 over Centennial Wash | 1934 | 2,097 | Poor |
| Irr Bia Rte 30 over Lateral Canal No 90 | 1969 | 280 | Poor |
| Irr Bia Rte 30 over Main Drain | 1963 | 280 | Poor |
| Irr Bia Rte 34 over Main Drain | 1963 | 270 | Poor |
| Irr Bia Rte 56 over Main Drain | 1968 | 165 | Poor |
| Irr Bia Rte 44 over Main Drain | 1963 | 130 | Poor |
| Irr Bia Rte 38 over Usbr Main Drain | 1953 | 30 | Poor |
| Irr Bia Rte 21 over Lateral No 90 | 1969 | 27 | Poor |
| Irr Bia Rte 60 over Main Drain | 1955 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 10 EB and WB over Colorado River | 1960 | 60,000 | Good |
| SR 95 over Silver Creek | 1978 | 32,600 | Fair |
| I 10; EB & WB over Wash | 1949 | 27,198 | Good |
| I 10; EB & WB over Wash | 1949 | 27,198 | Fair |
| I 10; EB & WB over Italian Wash | 1953 | 25,941 | Good |
| I 10; WB over Wash | 1969 | 25,941 | Good |
| I 10; EB & WB over Wash | 1953 | 25,764 | Good |
| I 10; EB & WB over Wash | 1963 | 25,764 | Good |
| I 10; EB & WB over Wash | 1964 | 25,358 | Good |
| I 10; EB & WB over Wash | 1960 | 25,358 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Arizona: Arizona 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.