4780 SO.ST.FA#2144 over Big Cottonwood Creek

Salt Lake County, Utah · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• 4780 SO.ST.FA#2144 over Big Cottonwood Creek in Salt Lake County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1973, making it 52 years old at the 2025 inventory.
• It carries about 16,215 vehicles a day (traffic count year 2013).
• Its listed owner is the county highway agency.
• It is one of 490 of the 666 inventoried bridges in Salt Lake County rated fair (73.6%); 29 (4.4%) are rated poor.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (40.6666, -111.85135)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Utah department of transportation.

Busiest bridges in Salt Lake County

All bridges nearby: Salt Lake County, UT bridge conditions · every bridge in Salt Lake County · Utah bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.