150TH St over Small Stream
Union County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 150TH St over Small Stream in Union County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2024, making it 1 years old at the 2025 inventory.
- It carries about 21 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 53 of the 172 inventoried bridges in Union County rated good (30.8%); 55 (32.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It does not appear under this structure number in the 2024 inventory (a new or renumbered structure).
- Its most recent inspection on record is dated October 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 → (41.08534, -94.29499)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 9 | Excellent condition |
| Superstructure | 9 | Excellent condition |
| Substructure | 9 | Excellent condition |
Bridge details
| Structure | Steel slab |
| Length | about 40 ft |
| Location | 073303401 |
| NBI structure number | 000000000326872 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Union County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 34 over Br. East Platte River | 1971 | 4,890 | Fair |
| US 34 over over BNSF RR | 1971 | 4,890 | Fair |
| US 34 over Twelve Mile Creek | 1971 | 4,890 | Fair |
| US 34 over Twelve Mile Creek | 1971 | 4,890 | Fair |
| Ia 25 over Stream | 1976 | 4,870 | Fair |
| US 169 over BNSF RR | 1980 | 3,870 | Good |
All bridges nearby: Union County, IA bridge conditions · every bridge in Union County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.