US 61 S over Mo 27
Clark County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 61 S over Mo 27 in Clark County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2006, making it 19 years old at the 2025 inventory.
- It carries about 571 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 95 of the 177 inventoried bridges in Clark County rated fair (53.7%); 13 (7.3%) 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 → (40.36199, -91.58736)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 269 ft |
| Location | S 8 T 64 N R 6 W |
| NBI structure number | 31567 |
| 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) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Clark County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 61 S over Doe Run CR | 1972 | 14,279 | Fair |
| US 61 S over Unnamed Trib | 2006 | 14,279 | Good |
| US 61 S over Unnamed CR | 2006 | 12,060 | Fair |
| US 61 S over Big Branch CR | 2006 | 10,194 | Good |
| Mo 27 S over Drain Dtch | 2002 | 9,030 | Fair |
| Mo 27 S over Drain Dtch | 2002 | 9,030 | Fair |
All bridges nearby: Clark County, MO bridge conditions · every bridge in Clark County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.