Irr Bia Rte 9 over Black River
Gila County, Arizona · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 9 over Black River in Gila County, Arizona, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1930 and reconstructed in 1983, making it 95 years old at the 2025 inventory.
- It carries about 5 vehicles a day (traffic count year 2024).
- It is one of 4 of the 259 inventoried bridges in Gila County rated poor (1.5%); 4 (1.5%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (33.713, -110.21181)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel deck truss |
| Length | about 276 ft |
| Location | 11.9 Mi S. of Az Hwy 73 |
| NBI structure number | 00000000000H055 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Gila County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 60 over Pinal Creek | 1920 | 22,518 | Fair |
| US 60 over Pinal Creek | 1942 | 21,948 | Fair |
| US 60 over Wash | 1949 | 16,468 | Fair |
| US 60 over Wash | 1949 | 16,468 | Fair |
| US 60 over Pinal Creek | 1959 | 16,320 | Fair |
| US 60 over McMillen Wash | 1930 | 16,297 | Fair |
All bridges nearby: Gila County, AZ bridge conditions · every bridge in Gila County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.