US 218 over Trib to Shell Rock River
Bremer County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 218 over Trib to Shell Rock River in Bremer 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 1996, making it 29 years old at the 2025 inventory.
- It carries about 9,700 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 139 of the 267 inventoried bridges in Bremer County rated good (52.1%); 32 (12.0%) 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 → (42.69385, -92.52035)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 24 ft |
| Location | 2.0 Mi. S Jct. Iowa #3 |
| NBI structure number | 000000000601775 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Bremer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 218 over Drainage Ditch | 2012 | 18,700 | Good |
| Ia 116 over Dry Run Creek | 2015 | 14,800 | Good |
| US 218 over Drainage Ditch | 2001 | 10,900 | Good |
| SB US 218 over Cedar River | 1993 | 9,700 | Fair |
| NB US 218 over Cedar River | 1993 | 9,500 | Fair |
| US 63 NB over over Abandon RR | 1978 | 8,700 | Fair |
All bridges nearby: Bremer County, IA bridge conditions · every bridge in Bremer County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.