US 71 over Drainage Ditch #34
Buena Vista County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 71 over Drainage Ditch #34 in Buena Vista County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1985, making it 40 years old at the 2025 inventory.
- It carries about 3,830 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 56 of the 157 inventoried bridges in Buena Vista County rated good (35.7%); 54 (34.4%) are rated poor.
- 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 → (42.76536, -95.15114)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 37 ft |
| Location | 1.1 mi. N of IA 3 |
| NBI structure number | 000000000016161 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Buena Vista County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 110 over Storm Lake Inlet | 1978 | 4,890 | Good |
| Ia 7 over Powell Creek | 1992 | 4,720 | Fair |
| US 71 & Ia 10 over Little Sioux River | 1973 | 4,570 | Fair |
| US 71 over Drainage Ditch #34 | 1985 | 3,830 | Fair |
| US 71 over Branch Raccoon River | 1996 | 3,000 | Fair |
| US 71 over Stream | 1996 | 3,000 | Good |
All bridges nearby: Buena Vista County, IA bridge conditions · every bridge in Buena Vista County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.