Ironsp-Skull Vly R over Dead Mule Wash
Yavapai County, Arizona · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ironsp-Skull Vly R over Dead Mule Wash in Yavapai 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 1958, making it 67 years old at the 2025 inventory.
- It carries about 1,090 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 343 of the 543 inventoried bridges in Yavapai County rated good (63.2%); 2 (0.4%) are rated poor.
- 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 → (34.50236, -112.68356)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 75 ft |
| Location | 6.7 mi N Jct Kirkland Rd |
| NBI structure number | 09454 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.
Busiest bridges in Yavapai County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR89A & 89 over Wash | 1986 | 48,064 | Good |
| SR 69 over Clipper Wash | 1954 | 36,515 | Good |
| SR 69 over Alberson Wash | 1953 | 35,999 | Good |
| I 17; N & S over Hance Draw | 1975 | 34,127 | Good |
| I 17; NB & SB over Hance Draw | 1975 | 34,127 | Good |
| Viewpoint Drive over SR 89A | 2011 | 32,954 | Good |
All bridges nearby: Yavapai County, AZ bridge conditions · every bridge in Yavapai County · Arizona bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.