Bridge conditions in Graham County, Arizona
181 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
7 of the 181 bridges the federal inventory lists in Graham County are rated poor; the rest split 80 good and 94 fair.
- 7 of the 181 bridges in Graham County, Arizona, are rated in poor condition (3.9%) in the 2025 National Bridge Inventory, as of .
- 80 bridges (44.2%) are rated good and 94 (51.9%) fair.
- The median Graham County bridge was built in 1953.
- The busiest poor-rated bridge is Layton Rd over Union Canal (built 1900), carrying about 203 vehicles a day.
Good 44.2% · Fair 51.9% · Poor 3.9% of 181 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 |
|---|---|---|---|
| Layton Rd over Union Canal | 1900 | 203 | Poor |
| Irr Bia Rte 3 over Twin Draw | 1929 | 120 | Poor |
| Irr Bia Rte 3 over Acorn Draw | 1929 | 120 | Poor |
| Irr Bia Rte 3 over Calva Wash | 1929 | 120 | Poor |
| Irr Bia Rte 3 over Oak Draw | 1929 | 120 | Poor |
| Irr Bia Rte 3 over Hint Canyon | 1929 | 120 | Poor |
| Curtis Road over San Jose Canal | 1987 | 21 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| 8th Street over Graveyard Wash | 1920 | 14,272 | Fair |
| US 70 over Graveyard Wash | 1948 | 14,272 | Fair |
| US 191 over Union Canal | 1958 | 9,321 | Good |
| US 70 over Stockton Wash | 1950 | 8,642 | Fair |
| Irr US 70 over Ash Creek | 1948 | 8,534 | Fair |
| US 191 over Graveyard Wash | 1958 | 8,018 | Good |
| US 191 over Swift Canyon Wash | 1953 | 7,459 | Good |
| US 191 over Marijilda Canyon | 1960 | 7,459 | Fair |
| US 191 over Wash | 1953 | 7,459 | Fair |
| US 70 over San Simon River | 1923 | 6,912 | 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.