R Drive South over St Joseph River
Calhoun County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- R Drive South over St Joseph River in Calhoun County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1973, making it 52 years old at the 2025 inventory.
- It carries about 78 vehicles a day (traffic count year 1994).
- Its listed owner is the county highway agency.
- It is one of 37 of the 213 inventoried bridges in Calhoun County rated poor (17.4%); 37 (17.4%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.11617, -84.84644)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Timber slab |
| Length | about 59 ft |
| Location | 2 1/2 Mi SW of Homer |
| NBI structure number | 000000000001355 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Calhoun County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 Bl & M-37 over I-94 | 2015 | 121,987 | Fair |
| I-94 EB over Riverside Drive | 2009 | 25,840 | Fair |
| I-94 WB over Riverside Drive | 2009 | 25,840 | Fair |
| I-194 over Kalamazoo River | 1966 | 24,600 | Fair |
| I-194 over Gtw RR | 1966 | 24,600 | Fair |
| I-194 over Conrail (abn) | 1966 | 24,600 | Fair |
All bridges nearby: Calhoun County, MI bridge conditions · every bridge in Calhoun County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.