Bridge conditions in St. Joseph County, Michigan
132 inventoried bridges · 16 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
St. Joseph County has 16 bridges rated poor out of 132 inventoried, a 12.1% share that puts it well above the national rate of about 7%.
- 16 of the 132 bridges in St. Joseph County, Michigan, are rated in poor condition (12.1%) in the 2025 National Bridge Inventory, as of .
- 39 bridges (29.5%) are rated good and 77 (58.3%) fair.
- The median St. Joseph County bridge was built in 1977.
- The busiest poor-rated bridge is Hoffman Street over Rockey River (built 1960), carrying about 4,600 vehicles a day.
Good 29.5% · Fair 58.3% · Poor 12.1% of 132 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 |
|---|---|---|---|
| Hoffman Street over Rockey River | 1960 | 4,600 | Poor |
| M-60 & M-66 over Nottawa Creek | 1931 | 3,200 | Poor |
| Sixth Street over St Joseph River | 1965 | 2,400 | Poor |
| Constantine Street over St Joseph River | 1972 | 1,493 | Poor |
| Farrand Road over St Joseph River | 1965 | 1,482 | Poor |
| Nottawa Road over Wood Lake Drain | 1966 | 1,455 | Poor |
| Fawn River Road over Fawn River | 1964 | 1,441 | Poor |
| North Burr Oak Rd over Little Swan Creek | 1963 | 824 | Poor |
| Findley Road over Prairie River | 1979 | 733 | Poor |
| Blue School Road over White Pigeon River | 1978 | 502 | Poor |
| Prairie Corner Rd over St Joseph River | 1974 | 466 | Poor |
| Findley Road over Prairie River | 1972 | 333 | Poor |
| Prairie River Road over Prairie River | 1967 | 277 | Poor |
| Mckale Road over Prairie River | 1965 | 77 | Poor |
| Needham Road over Prairie River | 1966 | 77 | Poor |
| Longnecker Rd over Bear Creek | 1969 | 57 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-131 over St Joseph River | 2013 | 9,999 | Good |
| US-131 NB over Rocky River | 1951 | 9,588 | Fair |
| US-131 SB over Rocky River | 1956 | 9,588 | Fair |
| US-131 over White Pigeon River | 1994 | 9,556 | Fair |
| M-60 & US-131 Br over Rocky River | 1966 | 9,299 | Fair |
| M-60 & US-131 Br over Rocky River Race | 1942 | 9,299 | Fair |
| M-86 (S Main St) over St Joseph River | 2000 | 6,441 | Fair |
| US-12 over Fawn River | 1983 | 5,925 | Fair |
| M-66 over Prairie River | 1931 | 5,400 | Fair |
| M-60 over Portage River | 1925 | 4,978 | Fair |
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.