170TH St over Elm CR
Putnam County, Missouri · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 170TH St over Elm CR in Putnam County, Missouri, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2022, making it 3 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 109 of the 214 inventoried bridges in Putnam County rated good (50.9%); 32 (15.0%) 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 → (40.48595, -93.2407)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 9 | Excellent condition |
| Superstructure | 9 | Excellent condition |
| Substructure | 9 | Excellent condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 60 ft |
| Location | S 35 T 66 N R 21 W |
| NBI structure number | 36786 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Putnam County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 5 S over Blackbird CR | 2010 | 1,494 | Good |
| US 136 W over E Locust CR | 2010 | 1,492 | Good |
| US 136 E over Tanyard Br | 1931 | 1,492 | Fair |
| US 136 E over Barber CR | 2002 | 1,247 | Fair |
| US 136 E over Old Chariton Rvr | 2008 | 1,183 | Fair |
| US 136 E over Shoal CR | 1966 | 1,146 | Good |
All bridges nearby: Putnam County, MO bridge conditions · every bridge in Putnam County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.