Bridge conditions in Miami County, Kansas
327 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
10 of the 327 bridges the federal inventory lists in Miami County are rated poor; the rest split 209 good and 108 fair.
- 10 of the 327 bridges in Miami County, Kansas, are rated in poor condition (3.1%) in the 2025 National Bridge Inventory, as of .
- 209 bridges (63.9%) are rated good and 108 (33.0%) fair.
- The median Miami County bridge was built in 1979.
- The busiest poor-rated bridge is Woodland Road over Trib. to Sweetwater Crk (built 2005), carrying about 655 vehicles a day.
Good 63.9% · Fair 33.0% · Poor 3.1% of 327 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 |
|---|---|---|---|
| Woodland Road over Trib. to Sweetwater Crk | 2005 | 655 | Poor |
| 255th Street over Stream | 1965 | 102 | Poor |
| 399th ST over La Cygne Lake | 1962 | 95 | Poor |
| New Lancaster Rd over Trib. to Middle Creek | 1920 | 94 | Poor |
| 239th Street over Trib. to Rock Creek | 1915 | 48 | Poor |
| 267th Street over Trib. to Ten Mile Creek | 1920 | 48 | Poor |
| 351st Street over Middle Creek | 1920 | 35 | Poor |
| 311th Street over Trib. Marais Des Cygnes | 1918 | 30 | Poor |
| 319th Street over Trib. Marais Des Cygnes | 1993 | 17 | Poor |
| 323rd Street over Trib. Marais Des Cygnes | 1930 | 14 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| K68 Hwy over US69 Hwy | 1979 | 12,722 | Fair |
| I35 Hwy over Rock Creek | 1958 | 11,200 | Fair |
| I35 Hwy SB over 223RD Street | 2004 | 11,200 | Good |
| I35 Hwy NB over 223 Rd Street | 2002 | 11,200 | Good |
| US69 Hwy SB over Local Road | 1966 | 8,773 | Fair |
| US69 Hwy NB over Local Road | 1966 | 8,773 | Good |
| US69 Hwy SB over Local Road | 1979 | 8,773 | Good |
| US69 Hwy NB over Local Road | 1979 | 8,773 | Good |
| US69 Hwy SB over Local Road | 1979 | 7,644 | Good |
| US69 Hwy NB over Local Road | 1979 | 7,644 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Kansas: Kansas 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.