SR-178 800 S. Int. over I-15 (SR-15) NBL & S

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

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

• SR-178 800 S. Int. over I-15 (SR-15) NBL & S in Utah County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1967 and reconstructed in 1978, making it 58 years old at the 2025 inventory.
• It carries about 13,525 vehicles a day (traffic count year 2022).
• Its listed owner is the state highway agency.
• It is one of 170 of the 274 inventoried bridges in Utah County rated fair (62.0%); 3 (1.1%) 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 → (40.03142, -111.75766)

Component ratings

Bridge details

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

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