Bridge conditions in Lewis County, Missouri
172 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 172 bridges in Lewis County: 46 rated good, 116 fair, and 10 poor.
- 10 of the 172 bridges in Lewis County, Missouri, are rated in poor condition (5.8%) in the 2025 National Bridge Inventory, as of .
- 46 bridges (26.7%) are rated good and 116 (67.4%) fair.
- The median Lewis County bridge was built in 1997.
- The busiest poor-rated bridge is Mo 156 E over Troublesome CR (built 1973), carrying about 487 vehicles a day.
Good 26.7% · Fair 67.4% · Poor 5.8% of 172 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 156 E over Troublesome CR | 1973 | 487 | Poor |
| Rt H S over Mid Fabius Rvr | 1961 | 107 | Poor |
| County Rd 429 over Wyaconda Rvr | 1910 | 50 | Poor |
| County Rd 526 over Sugar CR | 1910 | 35 | Poor |
| County Rd 504 over Mid Fabius Rvr | 1920 | 35 | Poor |
| County Rd 532 over N Fabius Rvr | 1915 | 35 | Poor |
| County Rd 597 over Drain Dtch to Miss | 1930 | 30 | Poor |
| County Rd 329 over Mid Fabius Rvr | 1900 | 25 | Poor |
| County Rd 552 over Wyaconda Rvr | 1900 | 15 | Poor |
| County Rd 597 over Oyster CR | 1910 | 15 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 61 S over Big Br CR | 1999 | 14,279 | Fair |
| US 61 S over Bland Br Ck | 2005 | 14,279 | Fair |
| US 61 S over Unnamed CR | 2005 | 14,279 | Fair |
| US 61 S over Unnamed CR | 2005 | 14,279 | Fair |
| US 61 S over Artesian Br CR | 2005 | 7,886 | Fair |
| US 61 N over Waconda Rvr | 2001 | 7,505 | Good |
| US 61 N over Linden Br | 2001 | 7,505 | Good |
| US 61 S over Wyaconda Rvr | 1974 | 7,028 | Fair |
| US 61 S over Linden Br | 1974 | 7,028 | Fair |
| US 61 S over Dungens CR | 1973 | 6,550 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Missouri: Missouri bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.