470TH Road over Branch of Piper CR
Polk County, Missouri · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 470TH Road over Branch of Piper CR in Polk County, Missouri, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2024, making it 1 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 63 of the 184 inventoried bridges in Polk County rated good (34.2%); 32 (17.4%) 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 → (37.56732, -93.3692)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Aluminum or iron culvert |
| Length | about 121 ft |
| Location | S 29 T 33 N R 22 W |
| NBI structure number | 37389 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Polk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 13 S over Slagle CR | 1973 | 25,477 | Fair |
| Mo 13 S over Dry Sac Rvr Br | 1973 | 22,761 | Fair |
| Mo 13 S over Br of Brush CR | 1958 | 14,992 | Fair |
| Mo 13 S over Br Dry Fork CR | 1958 | 14,992 | Fair |
| Mo 13 S over Dry Sac Rvr | 1972 | 11,979 | Fair |
| Mo 83 S over Mo 13 | 2003 | 11,254 | Fair |
All bridges nearby: Polk County, MO bridge conditions · every bridge in Polk County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.