Bridge conditions in Pinal County, Arizona
717 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
7 of the 717 bridges the federal inventory lists in Pinal County are rated poor; the rest split 454 good and 256 fair.
- 7 of the 717 bridges in Pinal County, Arizona, are rated in poor condition (1.0%) in the 2025 National Bridge Inventory, as of .
- 454 bridges (63.3%) are rated good and 256 (35.7%) fair.
- The median Pinal County bridge was built in 1966.
- The busiest poor-rated bridge is US 60 over Waterfall Canyon (built 1929), carrying about 8,079 vehicles a day.
Good 63.3% · Fair 35.7% · Poor 1.0% of 717 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 60 over Waterfall Canyon | 1929 | 8,079 | Poor |
| US 60 over Queen Creek | 1949 | 8,079 | Poor |
| Irr Bia Rte 15 over Wash | 1965 | 1,100 | Poor |
| Selma Highway over Casa Grande Canal Ext | 1900 | 450 | Poor |
| Bia Route 3 over E-spillway Coolidge Dam | 1928 | 390 | Poor |
| Old State Rte 87A over Gila River | 1925 | 200 | Poor |
| Irr Bia Rte 119 over Casa Blanca Canal | 1925 | 90 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 79 over Wash | 1952 | 179,518 | Fair |
| US 60 over Ironwood Drive | 1990 | 77,864 | Fair |
| US 60 over Wash | 1990 | 75,394 | Fair |
| Irr I 10; EB & WB over Wash | 1967 | 60,638 | Good |
| Irr I 10; EB & WB over Wash | 1967 | 60,638 | Good |
| Irr I 10 over Wash | 1967 | 60,638 | Good |
| Hunt Hwy over Wash | 2004 | 60,171 | Good |
| I 10; EB & WB over Wash | 1967 | 59,680 | Fair |
| I 10 over Wash | 1966 | 59,680 | Good |
| I 10; EB & WB over Wash | 1967 | 59,680 | Fair |
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.