Rt Zz N over Walnut CR
Cass County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rt Zz N over Walnut CR in Cass County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2011, making it 14 years old at the 2025 inventory.
- It carries about 87 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 206 of the 378 inventoried bridges in Cass County rated fair (54.5%); 31 (8.2%) 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 November 2023, on a 24-month routine inspection cycle.
- 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 → (38.5682, -94.10114)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 110 ft |
| Location | S 34 T 44 N R 29 W |
| NBI structure number | 33756 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| 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 Missouri department of transportation.
Busiest bridges in Cass County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 49 S over Cst 163RD St | 2008 | 45,809 | Good |
| Is 49 S over Millers Hollow CR | 1968 | 43,237 | Fair |
| Is 49 S over Muddy CR | 1965 | 38,579 | Fair |
| Is 49 S over Town CR | 1965 | 37,769 | Fair |
| Mo 58 E over Is 49 | 1968 | 35,273 | Fair |
| Is 49 N over Cst 163RD St | 2008 | 31,731 | Good |
All bridges nearby: Cass County, MO bridge conditions · every bridge in Cass County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.