Ia 175 over Stream
Sac County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ia 175 over Stream in Sac 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 1937 and reconstructed in 1997, making it 88 years old at the 2025 inventory.
- It carries about 1,820 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 71 of the 221 inventoried bridges in Sac County rated fair (32.1%); 65 (29.4%) 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 → (42.3115, -95.09177)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 21 ft |
| Location | 0.1 mi. W of jct. SR M64 |
| NBI structure number | 000000000046650 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Sac County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 over Unnamed Stream | 2017 | 4,850 | Good |
| E Main St over Raccoon River | 2004 | 3,853 | Good |
| US 20 EB US 71 SB over North Raccoon River | 2012 | 3,300 | Good |
| US 20 WB US 71 NB over North Raccoon River | 2012 | 3,300 | Good |
| US 20 EB over Cedar Creek | 2012 | 2,950 | Good |
| US 20 WB over Cedar Creek | 2012 | 2,950 | Good |
All bridges nearby: Sac County, IA bridge conditions · every bridge in Sac County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.