Bridge conditions in Miami County, Indiana
171 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Miami County tracks close to typical: 12 of its 171 inventoried bridges (7.0%) are rated poor, against a national rate of about 7%.
- 12 of the 171 bridges in Miami County, Indiana, are rated in poor condition (7.0%) in the 2025 National Bridge Inventory, as of .
- 62 bridges (36.3%) are rated good and 97 (56.7%) fair.
- The median Miami County bridge was built in 1972.
- The busiest poor-rated bridge is CR 1050 East over Big Pipe Creek (built 1930), carrying about 900 vehicles a day.
Good 36.3% · Fair 56.7% · Poor 7.0% of 171 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 |
|---|---|---|---|
| CR 1050 East over Big Pipe Creek | 1930 | 900 | Poor |
| CR 300 West over Rife Creek | 1935 | 625 | Poor |
| Water Street over Little Pipe Creek | 1930 | 300 | Poor |
| Park Drive over Schoolman Ditch | 1935 | 235 | Poor |
| CR 100 West over Little Weesau Creek | 1940 | 150 | Poor |
| CR 1400 North over Squirrel Creek | 1945 | 125 | Poor |
| CR 600 East over Squirrel Creek | 1920 | 100 | Poor |
| CR 950 North over Eel River | 1903 | 100 | Poor |
| CR 450 East over Daniel Creek | 1925 | 100 | Poor |
| CR 1200 South over Little Pipe Creek | 1930 | 100 | Poor |
| CR 1200 South over Russell Ditch | 1930 | 100 | Poor |
| CR 100 East over Eel River | 1915 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 31 over William H. Russell Creek | 2023 | 29,246 | Good |
| US 24 over Drainage Ditch | 1976 | 12,472 | Fair |
| US 31 NB over Big Pipe Creek | 1956 | 11,773 | Good |
| US 31 SB over Big Pipe Creek | 1972 | 11,773 | Good |
| US 31 NB over Deer Creek | 1972 | 11,648 | Fair |
| US 31 SB over Deer Creek | 1972 | 11,648 | Fair |
| US 24 over Branch Prairie Creek | 1976 | 10,836 | Good |
| US 24 over Prairie Creek | 1975 | 10,816 | Good |
| US 31 NB over Old US 24 NS RR | 1963 | 10,483 | Fair |
| US 31 NB over Prairie Ditch | 1963 | 10,418 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Indiana: Indiana 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.