Irr SR 389 over Cottonwood Wash
Mohave County, Arizona · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr SR 389 over Cottonwood Wash in Mohave County, Arizona, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 3,818 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 174 of the 640 inventoried bridges in Mohave County rated fair (27.2%); 4 (0.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- 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 → (36.928, -112.5642)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 199 ft |
| Location | 2.5 mi West Jct A89 |
| NBI structure number | 00890 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Mohave County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 95 over Wash | 1970 | 52,726 | Good |
| I 15 over Virgin River | 2023 | 32,832 | Good |
| I 40 & Beverly Ave over Wash | 1981 | 32,763 | Good |
| SR 95 over Dump Wash | 1989 | 32,600 | Good |
| I 15 over Virgin River | 1967 | 32,192 | Poor |
| I 15 over Virgin River | 1972 | 32,011 | Fair |
All bridges nearby: Mohave County, AZ bridge conditions · every bridge in Mohave County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.