Concord St over Drainage
Buchanan County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Concord St over Drainage in Buchanan County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1900, making it 125 years old at the 2025 inventory.
- It carries about 220 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 20 of the 320 inventoried bridges in Buchanan County rated poor (6.2%); 20 (6.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.59767, -91.63878)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 53 ft |
| Location | 000000000 |
| NBI structure number | 000000000007070 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Buchanan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-380 over Mud Creek | 1983 | 17,700 | Good |
| US 20 over Drainage Ditch | 1980 | 10,700 | Good |
| 1ST St W over Wapsipinicon River | 1917 | 10,258 | Fair |
| US 20 over Drainage Ditch | 1980 | 10,100 | Good |
| US 20 over Drainage Ditch | 1980 | 10,100 | Fair |
| Ia 150 over Wapsipinicon River | 1927 | 9,000 | Fair |
All bridges nearby: Buchanan County, IA bridge conditions · every bridge in Buchanan County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.