Rt Mm S over Grassy CR
Bollinger County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rt Mm S over Grassy CR in Bollinger County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1972, making it 53 years old at the 2025 inventory.
- It carries about 67 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 68 of the 124 inventoried bridges in Bollinger County rated fair (54.8%); 17 (13.7%) 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 December 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 → (37.28319, -90.2137)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 124 ft |
| Location | S 7 T 30 N R 8 E |
| NBI structure number | 2446 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 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 Bollinger County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 34 E over Crooked CR | 1973 | 10,096 | Fair |
| Mo 34 E over Hurricane CR | 1975 | 4,204 | Fair |
| Mo 34 E over Hog CR | 1940 | 3,649 | Fair |
| Mo 72 E over Lit Muddy CR | 1992 | 2,649 | Fair |
| Mo 34 E over Drunken CR | 1922 | 2,274 | Fair |
| Mo 51 S over Opossum CR | 1992 | 2,248 | Fair |
All bridges nearby: Bollinger County, MO bridge conditions · every bridge in Bollinger County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.