Bridge conditions in Navajo County, Arizona
278 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
6 of the 278 bridges the federal inventory lists in Navajo County are rated poor; the rest split 148 good and 124 fair.
- 6 of the 278 bridges in Navajo County, Arizona, are rated in poor condition (2.2%) in the 2025 National Bridge Inventory, as of .
- 148 bridges (53.2%) are rated good and 124 (44.6%) fair.
- The median Navajo County bridge was built in 1972.
- The busiest poor-rated bridge is I-40 WB over SB 40 (built 1969), carrying about 21,131 vehicles a day.
Good 53.2% · Fair 44.6% · Poor 2.2% of 278 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-40 WB over SB 40 | 1969 | 21,131 | Poor |
| Irr Bia Rte N4 over Wepo Wash | 1990 | 4,078 | Poor |
| Irr Bia Rte N15 over Black Canyon Wash | 1986 | 2,051 | Poor |
| Irr Bia Rte N65 over Tse Chizzi Wash | 1976 | 450 | Poor |
| Irr Bia Rte N6486 over Laguna Creek | 1965 | 150 | Poor |
| I-40; Sfr over Ltl Lithodendron Wash | 1932 | 60 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 40 Nfr & Sfr over Wash | 1974 | 24,335 | Good |
| I 40; EB & WB over Wash | 1954 | 24,068 | Good |
| I 40; EB & WB over Wash | 1962 | 23,968 | Good |
| I 40; EB & WB over Wash | 1962 | 23,968 | Good |
| I 40; EB & WB over Wash | 1965 | 23,968 | Good |
| I 40; EB & WB over Wash | 1965 | 23,968 | Good |
| I 40; EB & WB over Wash | 1979 | 23,929 | Good |
| I 40; EB & WB over Wash | 1979 | 23,602 | Good |
| I 40; EB & WB over Drainage Channel | 1979 | 22,407 | Fair |
| I 40; EB & WB & N over Channel A | 1979 | 22,407 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Arizona: Arizona bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.