Irr Bia Rte N6720 over Dinnebito Wash
Coconino County, Arizona · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte N6720 over Dinnebito Wash in Coconino County, Arizona, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1974, making it 51 years old at the 2025 inventory.
- It carries about 90 vehicles a day (traffic count year 2023).
- It is one of 192 of the 406 inventoried bridges in Coconino County rated fair (47.3%); 4 (1.0%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 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 → (35.65492, -110.94797)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 50 ft |
| Location | 5 Mi SW of Sand Springs |
| NBI structure number | 00000000000N309 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Coconino County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 89A Spur over Sinclair Wash | 1967 | 33,785 | Good |
| I 17 S 89A over Wash | 1940 | 33,483 | Good |
| SB 40 over Rio De Flag | 2021 | 33,068 | Good |
| SR89A over McConnel Drive | 1967 | 32,497 | Good |
| I-17 over I40 ramp E- N | 2000 | 32,232 | Fair |
| Country Club Road over Old 66 Industrial Dr/RR | 2007 | 31,850 | Good |
All bridges nearby: Coconino County, AZ bridge conditions · every bridge in Coconino County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.