170TH St over Chequest Creek
Davis County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 170TH St over Chequest Creek in Davis County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2021, making it 4 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 76 of the 163 inventoried bridges in Davis County rated good (46.6%); 39 (23.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 9 to 8, superstructure 9 to 8, substructure 9 to 8.
- Its most recent inspection on record is dated May 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 → (40.8134, -92.44228)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 8 | Very good condition |
| Superstructure | 9 | 8 | Very good condition |
| Substructure | 9 | 8 | Very good condition |
Bridge details
| Structure | Steel slab |
| Length | about 40 ft |
| Location | 069140201 |
| NBI structure number | 000000000134671 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 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 Davis County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 63 over North Chequest Creek | 1963 | 5,900 | Fair |
| US 63 over Middle Chequest Creek | 1963 | 5,800 | Fair |
| US 63 over Fox River | 1948 | 5,600 | Fair |
| US 63 & Ia 2 over Stream | 1977 | 3,790 | Fair |
| US 63 over Fabius Creek | 1974 | 1,990 | Fair |
| US 63 over North Fabius Creek | 1974 | 1,990 | Fair |
All bridges nearby: Davis County, IA bridge conditions · every bridge in Davis County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.