I-80 over Drainage Ditch
Scott County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-80 over Drainage Ditch in Scott County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1963, making it 62 years old at the 2025 inventory.
- It carries about 34,600 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 158 of the 291 inventoried bridges in Scott County rated fair (54.3%); 29 (10.0%) 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 → (41.59726, -90.44932)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 33 ft |
| Location | 3.9 Mi. E of Jct. I-74 |
| NBI structure number | 000000000047650 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Scott County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 over Mississippi River & RR | 1967 | 38,100 | Fair |
| I 74 WB over Mississippi River | 2020 | 37,650 | Good |
| WB US 6 over Goose Creek | 2011 | 35,400 | Good |
| I-80 over Stream | 1963 | 34,600 | Fair |
| I-80 over Drainage Ditch | 1963 | 31,600 | Fair |
| I-80 over Crow Creek | 1963 | 31,400 | Fair |
All bridges nearby: Scott County, IA bridge conditions · every bridge in Scott County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.