Calvin Center Road over Christiana Creek
Cass County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Calvin Center Road over Christiana Creek in Cass County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 2,276 vehicles a day (traffic count year 2009).
- Its listed owner is the county highway agency.
- It is one of 32 of the 53 inventoried bridges in Cass County rated fair (60.4%); 8 (15.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: culvert 6 to 5.
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (41.87501, -85.93356)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 5 | Fair condition |
Bridge details
| Structure | Steel culvert |
| Length | about 24 ft |
| Location | 0.25MI N of Williamsville |
| NBI structure number | 000000000013267 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Cass County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-12 over M-60 | 1960 | 9,010 | Fair |
| M-51 over Dowagiac Creek | 1949 | 8,127 | Fair |
| US-12 over Christiana Creek | 1941 | 8,072 | Fair |
| US-12 over Brandywine Creek | 1982 | 7,438 | Fair |
| M-62 over Dowagiac Creek | 1950 | 7,355 | Fair |
| US-12 over Valley Creek | 2011 | 7,350 | Good |
All bridges nearby: Cass County, MI bridge conditions · every bridge in Cass County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.