I-15NB (SR-15) over 300 West Street
Utah County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-15NB (SR-15) over 300 West Street in Utah County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 48,010 vehicles a day (traffic count year 2014).
- 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 → (40.1213, -111.66009)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 96 ft |
| Location | 900 No.300 W. Spanish Fk. |
| NBI structure number | 1F 831 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Utah department of transportation.
Busiest bridges in Utah County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-15NB (SR-15) over American Fork Creek | 2011 | 209,636 | Fair |
| I-15NB (SR-15) over 100 E. in AMERICAN FORK | 2011 | 209,636 | Good |
| I-15NB (SR-15) over 300 West Street | 2011 | 209,636 | Fair |
| I-15SB (SR-15) over American Fork Creek | 2011 | 209,636 | Good |
| I-15SB (SR-15) over 100 E. in AMERICAN FORK | 2011 | 209,636 | Good |
| I-15 (SR-15) Sbl over 300 West Street | 2011 | 209,636 | Fair |
All bridges nearby: Utah County, UT bridge conditions · every bridge in Utah County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.