I-15 (SR-15) Sbl over SR-28 Intchg. X-rd
Juab County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-15 (SR-15) Sbl over SR-28 Intchg. X-rd in Juab County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 34,167 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 54 of the 60 inventoried bridges in Juab County rated fair (90.0%); 2 (3.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2023, on a 24-month routine inspection cycle.
- 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 → (39.68188, -111.83868)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 169 ft |
| Location | South Nephi Interchange |
| NBI structure number | 3C 714 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Utah department of transportation.
Busiest bridges in Juab County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-15 NB over Deer Crossing | 1974 | 45,000 | Fair |
| I-15 (SR-15) over Salt Creek | 1982 | 43,893 | Fair |
| I-15 (SR-15) Nbl over 700 North Street Nephi | 1982 | 43,893 | Fair |
| I-15 (SR-15) Sbl over 700 North Street Nephi | 1982 | 43,893 | Fair |
| I-15 SB over Deer Crossing | 1974 | 43,829 | Fair |
| I-15 (SR-15) Nbl over Co. Rd. to North Canyon | 1974 | 42,557 | Fair |
All bridges nearby: Juab County, UT bridge conditions · every bridge in Juab County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.