Irr Bia Rte 34 over Wash
Pima County, Arizona · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 34 over Wash in Pima County, Arizona, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1974, making it 51 years old at the 2025 inventory.
- It carries about 170 vehicles a day (traffic count year 2023).
- It is one of 782 of the 1,154 inventoried bridges in Pima County rated good (67.8%); 11 (1.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (32.34075, -112.33914)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 31 ft |
| Location | 35.2 Km NE of Az Hwy 86 |
| NBI structure number | 00000000000H646 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Pima County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ramp to I-10 NW over I 10 Mainline | 2003 | 281,068 | Fair |
| I-10 EB & WB over Cushing Street | 2009 | 209,279 | Good |
| I-10 EB & WB over 18th Street | 2009 | 209,269 | Good |
| I-10 EB & WB over Congress Street | 2009 | 195,388 | Good |
| I-10 over St. Marys Rd | 2009 | 195,068 | Fair |
| I-10 over Speedway Blvd. | 2009 | 195,068 | Good |
All bridges nearby: Pima County, AZ bridge conditions · every bridge in Pima County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.