Bridge conditions in Millard County, Utah
72 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Millard County tracks close to typical: 2 of its 72 inventoried bridges (2.8%) are rated poor, against a national rate of about 7%.
- 2 of the 72 bridges in Millard County, Utah, are rated in poor condition (2.8%) in the 2025 National Bridge Inventory, as of .
- 8 bridges (11.1%) are rated good and 62 (86.1%) fair.
- The median Millard County bridge was built in 1973.
- The busiest poor-rated bridge is Chalk Creek Road over S. Fk. Chalk Creek (built 1965), carrying about 60 vehicles a day.
Good 11.1% · Fair 86.1% · Poor 2.8% of 72 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 |
|---|---|---|---|
| Chalk Creek Road over S. Fk. Chalk Creek | 1965 | 60 | Poor |
| County Road over Central Utah Canal | 1935 | 38 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-15 (SR-15)NB&SB over Chalk Creek | 1972 | 24,744 | Fair |
| I-15 (SR-15)NB&SB over Chalk Creek Overflow Ch. | 1972 | 24,744 | Fair |
| I-15 (SR-15) Nbl over SR-99 Intchg. X-road | 1972 | 24,744 | Fair |
| I-15 (SR-15) Sbl over SR-99 Intchg. X-road | 1972 | 24,744 | Fair |
| I-15 SB over Dog Valley Access Rd | 2022 | 23,000 | Good |
| I-15 (SR-15) Nbl over Co. Rd. Inter X-road | 1966 | 22,567 | Fair |
| I-15 (SR-15) Nbl over Co. Rd. Inter X-road | 1972 | 22,567 | Fair |
| I-15 (SR-15) Sbl over Co. Rd. Inter X-road | 1972 | 22,567 | Fair |
| I-15 NB over Wildlife Crossing | 2021 | 20,000 | Fair |
| I-15 SB over Wildlife Crossing | 2021 | 20,000 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Utah: Utah 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.