I-35 over Drainage Ditch
Cerro Gordo County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-35 over Drainage Ditch in Cerro Gordo 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 1972, making it 53 years old at the 2025 inventory.
- It carries about 18,100 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 119 of the 268 inventoried bridges in Cerro Gordo County rated good (44.4%); 14 (5.2%) 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 → (42.98625, -93.34141)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 21 ft |
| Location | 0.4 mi. N of Jct. SR B60 |
| NBI structure number | 000000000602280 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Cerro Gordo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-35 over Calmus Creek | 1970 | 21,400 | Fair |
| Ia 122 over Cheslea Creek | 2010 | 18,800 | Good |
| I-35 over Drainage Ditch | 1972 | 17,700 | Fair |
| I-35 over Drainage Ditch | 1971 | 17,600 | Fair |
| I 35 over Drainage Ditch | 1972 | 17,600 | Fair |
| I-35 over Willow Creek | 1971 | 17,200 | Fair |
All bridges nearby: Cerro Gordo County, IA bridge conditions · every bridge in Cerro Gordo County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.