Bilby Road over Airport Wash
Pima County, Arizona · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Bilby Road over Airport Wash in Pima County, Arizona, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1969, making it 56 years old at the 2025 inventory.
- It carries about 4,500 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 361 of the 1,154 inventoried bridges in Pima County rated fair (31.3%); 11 (1.0%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (32.1414, -110.9663)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 108 ft |
| Location | 0.1 mi E Jct 6th Ave |
| NBI structure number | 08815 |
| Condition class | Fair |
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.