Bridge conditions in Boone County, Indiana
292 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
12 of the 292 bridges the federal inventory lists in Boone County are rated poor; the rest split 118 good and 162 fair.
- 12 of the 292 bridges in Boone County, Indiana, are rated in poor condition (4.1%) in the 2025 National Bridge Inventory, as of .
- 118 bridges (40.4%) are rated good and 162 (55.5%) fair.
- The median Boone County bridge was built in 1972.
- The busiest poor-rated bridge is SR 32 over Finley Creek (built 1958), carrying about 7,502 vehicles a day.
Good 40.4% · Fair 55.5% · Poor 4.1% of 292 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 |
|---|---|---|---|
| SR 32 over Finley Creek | 1958 | 7,502 | Poor |
| US 52 WB over I-65 Sb/nb | 1970 | 4,664 | Poor |
| CR 100S over Prairie Creek | 1920 | 850 | Poor |
| SR 38 over Stoker Ditch | 1966 | 329 | Poor |
| CR 1000E over Big Eagle Creek | 1925 | 300 | Poor |
| CR 600E over Mounts Run | 1930 | 260 | Poor |
| Hazelrigg Road over Deer Creek | 1935 | 230 | Poor |
| CR 600W over W Fork Big Walnut Creek | 1980 | 200 | Poor |
| CR 875W over Walnut Fork Sugar CR | 1925 | 120 | Poor |
| Mdl Jamestown Rd over Cunningham Ditch | 1930 | 120 | Poor |
| CR 900W over Little Sugar Creek | 1960 | 120 | Poor |
| Wind Haven Lane over Prairie Creek | 1925 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-65 over Prairie Creek | 1948 | 73,132 | Fair |
| CR 100 Ehall-baker over I-65 Sb/nb | 1958 | 73,132 | Fair |
| I-65 over Prairie Creek | 2010 | 73,132 | Good |
| I-465 WB over Zionsville Road | 1967 | 57,399 | Fair |
| I-65 NB over Prairie Creek Trail | 2014 | 57,066 | Fair |
| I-65 SB over Prairie Creek Trail | 2014 | 57,066 | Fair |
| I-65 over Prairie Creek | 1948 | 57,066 | Good |
| I-465 EB over Zionsville Road | 1967 | 55,699 | Fair |
| I-465 EB over Abandoned RR | 1967 | 49,259 | Fair |
| I-465 WB over Abandoned RR | 1967 | 49,259 | Fair |
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.