US 169 over Trulner Creek
Humboldt County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 169 over Trulner Creek in Humboldt County, Iowa, 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 1995, making it 30 years old at the 2025 inventory.
- It carries about 3,220 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 46 of the 87 inventoried bridges in Humboldt County rated fair (52.9%); 7 (8.0%) 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 → (42.85893, -94.22728)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 153 ft |
| Location | 0.3 mi. S of SR C20 |
| NBI structure number | 000000000028941 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Humboldt County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 169 over W Fork Des Moines River | 1997 | 7,100 | Fair |
| US 169 over Indian Creek | 2011 | 5,400 | Good |
| Ia 3 over Stream | 1939 | 4,590 | Good |
| Sumner Ave SW over West Des Moines River | 2015 | 3,472 | Good |
| US 169 over Drainage Ditch | 1985 | 3,220 | Fair |
| US 169 over Bloody Run Creek | 1985 | 3,220 | Fair |
All bridges nearby: Humboldt County, IA bridge conditions · every bridge in Humboldt County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.