Bridge conditions in Kalkaska County, Michigan
15 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 15 bridges the federal inventory lists in Kalkaska County are rated poor; the rest split 7 good and 7 fair.
- 1 of the 15 bridges in Kalkaska County, Michigan, are rated in poor condition (6.7%) in the 2025 National Bridge Inventory, as of .
- 7 bridges (46.7%) are rated good and 7 (46.7%) fair.
- The median Kalkaska County bridge was built in 1979.
- The busiest poor-rated bridge is Kniss Road over North Br Manistee River (built 1910), carrying about 19 vehicles a day.
Good 46.7% · Fair 46.7% · Poor 6.7% of 15 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 |
|---|---|---|---|
| Kniss Road over North Br Manistee River | 1910 | 19 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Us-131|m-66|m-72|s over N Br Boardman River | 1940 | 8,567 | Fair |
| N Rapid City Road over Rapid River | 1983 | 5,800 | Good |
| Boardman Road over Boardman River | 1988 | 1,700 | Fair |
| Aarwood Road over Rapid River | 2012 | 1,340 | Good |
| M-66 over Manistee River | 1979 | 1,150 | Fair |
| W Sharon Road over Manistee River | 1958 | 1,060 | Good |
| N Sharon Road over Manistee River | 1971 | 330 | Fair |
| Coster Road over Manistee River | 1977 | 290 | Fair |
| N Sharon Rd/co 571 over North Br Manistee River | 2002 | 150 | Good |
| Mecum Road over N Br Manistee River | 2012 | 100 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Michigan: Michigan 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.