Ia 64 over Drainage Ditch
Jones County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ia 64 over Drainage Ditch in Jones 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 1979, making it 46 years old at the 2025 inventory.
- It carries about 2,760 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 85 of the 230 inventoried bridges in Jones County rated good (37.0%); 11 (4.8%) 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 → (42.08974, -91.23868)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 28 ft |
| Location | 1.9 Mi. E of US. 151 |
| NBI structure number | 000000000032421 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Jones County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 151 over Drainage Ditch | 1964 | 14,100 | Fair |
| US 151 over Unnamed Creek | 2001 | 12,200 | Good |
| 3RD Street over Fawn Creek | 1965 | 7,954 | Fair |
| US 151 SB over Wapsipinicon River | 1964 | 7,350 | Fair |
| US 151 NB over Wapsipinicon River | 2002 | 7,200 | Fair |
| US 151 SB over Kitty Creek | 1960 | 6,250 | Fair |
All bridges nearby: Jones County, IA bridge conditions · every bridge in Jones County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.