I-80 over Drainage Ditch
Madison County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-80 over Drainage Ditch in Madison County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 27,600 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 105 of the 225 inventoried bridges in Madison County rated fair (46.7%); 82 (36.4%) 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 → (41.50242, -94.21023)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 49 ft |
| Location | 1.0 mi. W of Jct. SR P-53 |
| NBI structure number | 000000000034850 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 169 over Cedar Creek | 1990 | 5,900 | Good |
| US 169 over North River | 1969 | 4,280 | Fair |
| US 169 over N Branch North River | 1983 | 4,280 | Fair |
| US 169 over Stream | 1944 | 4,280 | Fair |
| FM over Middle River | 1996 | 2,091 | Fair |
| US 169 over Clanton Creek | 1976 | 1,890 | Good |
All bridges nearby: Madison County, IA bridge conditions · every bridge in Madison County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.