US 20 WB over Cedar Creek
Sac County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 20 WB over Cedar Creek in Sac County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 2,950 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 85 of the 221 inventoried bridges in Sac County rated good (38.5%); 65 (29.4%) 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 August 2024, on a 24-month routine inspection cycle.
- 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 → (42.45304, -94.90502)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 306 ft |
| Location | 2.5 mi. E of SR N14 |
| NBI structure number | 000000000700105 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 |
| Ia 175 over High St | 1934 | 2,540 | Fair |
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.