Bridge conditions in Summit County, Utah
137 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 137 bridges in Summit County: 16 rated good, 108 fair, and 13 poor.
- 13 of the 137 bridges in Summit County, Utah, are rated in poor condition (9.5%) in the 2025 National Bridge Inventory, as of .
- 16 bridges (11.7%) are rated good and 108 (78.8%) fair.
- The median Summit County bridge was built in 1985.
- The busiest poor-rated bridge is I-80 (SR-80) over Echo Creek (built 1967), carrying about 14,685 vehicles a day.
Good 11.7% · Fair 78.8% · Poor 9.5% of 137 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-80 (SR-80) over Echo Creek | 1967 | 14,685 | Poor |
| I-80 (SR-80) Wbl over Weber River | 2012 | 6,011 | Poor |
| SR-32 over Silver Creek | 1980 | 2,990 | Poor |
| SR-32 over Weber River | 1955 | 1,660 | Poor |
| County Road over Smith and Morehouse CR | 1996 | 914 | Poor |
| County Road over Weber River | 1970 | 252 | Poor |
| Judd Lane-co. Rd. over Weber River | 1995 | 252 | Poor |
| SR-302 over Weber River | 2009 | 240 | Poor |
| County Road over Weber-provo Div. Canal | 1960 | 233 | Poor |
| 200 West Street over Weber-provo Div. Canal | 1945 | 126 | Poor |
| County Road over Weber River | 1950 | 115 | Poor |
| Co.rd. F# 2600 over Smith-moorehouse Ck. | 1950 | 100 | Poor |
| Road 80051 over Red Pine Creek | 1953 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80WB (SR-80) over Int.x-rd@parleys Summit | 2011 | 64,590 | Fair |
| I-80 (SR-80) Ebl over Co. Rd. Intchg. X-road | 1971 | 53,725 | Fair |
| I-80 (SR-80) Wbl over Co.rd. Intchg. X-road | 1971 | 53,725 | Fair |
| I-80 (SR-80) Ebl over Co.rd.at Mtn.meadow | 1970 | 51,705 | Fair |
| I-80 (SR-80) Wbl over Co.rd.at Mtn.meadow | 1970 | 51,705 | Fair |
| I-80EB (SR-80) over Int.x-rd@parleys Summit | 2011 | 50,380 | Fair |
| SR-224 Int.x-rd. over I-80 (SR-80) Ebl & W | 2000 | 30,140 | Fair |
| US-40 (SR-40) Ebl over SR-248 Intchg. X-rd | 1989 | 29,125 | Fair |
| US-40 over Ped / Wildlife Trail | 2015 | 29,125 | Good |
| US-40 over Ped / Wildlife Trail | 2015 | 29,125 | Good |
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.