NW 70TH St over Middle CR
Grundy County, Missouri · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- NW 70TH St over Middle CR in Grundy County, Missouri, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1994, making it 31 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 103 of the 185 inventoried bridges in Grundy County rated good (55.7%); 18 (9.7%) 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 February 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 → (40.17657, -93.67633)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 40 ft |
| Location | S 11 T 62 N R 25 W |
| NBI structure number | 17615 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 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 Missouri department of transportation.
Busiest bridges in Grundy County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 6 E over UP RR | 2003 | 8,128 | Good |
| Mo 6 E over Muddy CR | 1990 | 5,007 | Good |
| Mo 6 E over Thompson Rvr | 1962 | 4,698 | Fair |
| US 65 S over Honey CR Drain Dtc | 1973 | 3,670 | Fair |
| US 65 S over Muddy CR | 1971 | 3,400 | Fair |
| US 65 S over Mo 6 | 1971 | 3,209 | Fair |
All bridges nearby: Grundy County, MO bridge conditions · every bridge in Grundy County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.