Cnty.road-fas# 370 over Big Hollow Wash
Iron County, Utah · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cnty.road-fas# 370 over Big Hollow Wash in Iron County, Utah, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 1,550 vehicles a day (traffic count year 2010).
- Its listed owner is the county highway agency.
- It is one of 8 of the 69 inventoried bridges in Iron County rated good (11.6%); 1 (1.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (deck 6 to 7, superstructure 6 to 7).
- Its most recent inspection on record is dated March 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.77378, -113.2645)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete frame |
| Length | about 25 ft |
| Location | 1.8 Mi.so. of Wecco Plant |
| NBI structure number | 021012D |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
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.