I-15 (SR-15) Nbl over County Road-no. Field
Iron County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-15 (SR-15) Nbl over County Road-no. Field in Iron County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1968 and reconstructed in 1993, making it 57 years old at the 2025 inventory.
- It carries about 24,335 vehicles a day (traffic count year 2014).
- Its listed owner is the state highway agency.
- It is one of 60 of the 69 inventoried bridges in Iron County rated fair (87.0%); 1 (1.4%) 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 → (37.71167, -113.06806)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 83 ft |
| Location | 2.2 Mi.no.cedar City Int. |
| NBI structure number | 1D 788 |
| 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 Iron County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-15 (SR-15) Nbl over SR-56 200 North Street | 1968 | 35,848 | Fair |
| I-15 (SR-15) Sbl over SR-56 200 North Street | 1968 | 35,848 | Fair |
| I-15 (SR-15) Nbl over Co Rd to Kanarraville | 1966 | 34,474 | Fair |
| I-15 (SR-15) Sbl over Co Rd to Kanarraville | 1966 | 34,474 | Fair |
| I-15 (SR-15)NB&SB over Kanarra Creek | 1966 | 33,319 | Fair |
| I-15 NB over East Nichols Canyon Road | 2021 | 29,000 | Good |
All bridges nearby: Iron County, UT bridge conditions · every bridge in Iron County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.