303 L over Unnamed Wash
Maricopa County, Arizona · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 303 L over Unnamed Wash in Maricopa County, Arizona, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2004 and reconstructed in 2015, making it 21 years old at the 2025 inventory.
- It carries about 14,923 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 1,961 of the 2,854 inventoried bridges in Maricopa County rated good (68.7%); 4 (0.1%) 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 March 2023, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (33.69629, -112.36204)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 2.8 mi NE of US 60 |
| NBI structure number | 07224 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 48 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 Maricopa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 101L over Cave Creek Road | 2001 | 282,818 | Good |
| US 60 over Mesa Drainage Channel | 1977 | 246,297 | Good |
| Sl 202 over Grand Canal | 1990 | 243,128 | Good |
| Sl 202 over 40th Street | 1989 | 243,128 | Fair |
| US 60 over SPRR & S Center St | 1981 | 242,887 | Good |
| SL 202 (Red Mtn) over Indian Bend Wash | 1994 | 236,447 | Good |
All bridges nearby: Maricopa County, AZ bridge conditions · every bridge in Maricopa County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.