Bridge conditions in Mercer County, Missouri
135 inventoried bridges · 23 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Mercer County has 23 bridges rated poor out of 135 inventoried, a 17.0% share that puts it well above the national rate of about 7%.
- 23 of the 135 bridges in Mercer County, Missouri, are rated in poor condition (17.0%) in the 2025 National Bridge Inventory, as of .
- 62 bridges (45.9%) are rated good and 50 (37.0%) fair.
- The median Mercer County bridge was built in 1997.
- The busiest poor-rated bridge is US 136 E over Grand Rvr Ovrfl (built 1971), carrying about 1,917 vehicles a day.
Good 45.9% · Fair 37.0% · Poor 17.0% of 135 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 |
|---|---|---|---|
| US 136 E over Grand Rvr Ovrfl | 1971 | 1,917 | Poor |
| Rt E E over W Medicine Ck | 1971 | 439 | Poor |
| Rt E E over W Honey CR | 1932 | 309 | Poor |
| Brant St E over UP RR | 1900 | 218 | Poor |
| Rt D E over West Muddy CR | 1935 | 121 | Poor |
| Rt Jj E over Honey CR | 1957 | 67 | Poor |
| Bison St over Lit Muddy CR | 1994 | 35 | Poor |
| Harmonica Rd over UP RR | 1901 | 35 | Poor |
| Jewell St over West Honey CR | 1994 | 35 | Poor |
| Helium Rd over Trib Lit Medicine | 1950 | 30 | Poor |
| Jogger Ave over Br of W Muddy Crk | 1930 | 20 | Poor |
| Beetle St over Lit Weldon Rvr | 1910 | 15 | Poor |
| Colony Loop over Trib of Weldon Br | 1950 | 15 | Poor |
| Gemstone Ave over West Honey CR | 1930 | 15 | Poor |
| Garner St over W Muddy CR | 1920 | 15 | Poor |
| Danube St over Brushy CR | 1971 | 15 | Poor |
| Iceberg Rd over Martin CR | 1920 | 15 | Poor |
| Kale St over Peteet CR | 1998 | 10 | Poor |
| Arctic St over Lit Muddy CR | 2005 | 10 | Poor |
| Concord St over Muddy CR | 1910 | 5 | Poor |
| Foghorn St over Br Lit Medicine CR | 1940 | 5 | Poor |
| Delta St over Big Br | 1900 | 5 | Poor |
| Ebony St over Brush CR | 1900 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 65 S over Wildcat CR | 2001 | 2,192 | Fair |
| US 136 E over Weldon Fk of Grand | 1971 | 1,917 | Fair |
| US 136 E over Grand Rvr Ovrfl | 1971 | 1,917 | Poor |
| US 136 E over W Muddy CR | 1971 | 1,221 | Fair |
| US 136 E over W Muddy CR | 1971 | 1,221 | Fair |
| US 136 E over Sandy CR | 1985 | 1,084 | Good |
| US 136 E over Martin CR | 1931 | 1,084 | Fair |
| US 136 E over Lit Medicine CR | 2002 | 1,045 | Fair |
| US 136 E over Wildcat CR | 2006 | 905 | Fair |
| US 136 E over UP RR | 2006 | 905 | 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.