Bia Route 3 over E-spillway Coolidge Dam
Pinal County, Arizona · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Bia Route 3 over E-spillway Coolidge Dam in Pinal County, Arizona, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1928 and reconstructed in 1995, making it 97 years old at the 2025 inventory.
- It carries about 390 vehicles a day (traffic count year 2021).
- It is one of 7 of the 717 inventoried bridges in Pinal County rated poor (1.0%); 7 (1.0%) 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 → (33.17486, -110.52669)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 173 ft |
| Location | 19.2 Km SW San Carlos Az |
| NBI structure number | 00000000000H213 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Pinal 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 |
All bridges nearby: Pinal County, AZ bridge conditions · every bridge in Pinal County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.