Cass County Bridge Report Card
Cass County scores 43 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Cass County, Michigan
Cass County has 53 bridges in the National Bridge Inventory, with 8 rated poor and 8 rated scour-critical. Its poor-condition share of 15.1% is above the 11.0% statewide average. Poor-condition bridges carry about 5,686 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Cass County a Bridge Condition Exposure Score of 43/100 (F). The county has 53 bridges in the National Bridge Inventory, including 8 in poor condition and 8 rated scour-critical. Poor-condition bridges carry about 5,686 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 15.1% | 30.2 |
| Poor-condition traffic exposure | 25 | 4.7% of measured traffic | 3.5 |
| Scour-critical bridge share | 20 | 15.1% | 20.0 |
| Average age vs national baseline | 10 | 56 years vs 48 nationally | 3.3 |
| Traffic-data completeness | 5 | 122,267 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 15.1% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 15.1% |
| Average Bridge Age | 56 years |
| Poor-Condition Traffic Exposure | 5,686 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Cass County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Cassopolis RD over Christiana Creek | Poor condition + traffic exposure | Poor | 159 | 1960 |
| Frost Street over Dowagiac River | Poor condition + traffic exposure | Poor | 56 | 1930 |
| Yaw Street over Dowagiac River | Poor condition + traffic exposure | Poor | 26 | 1930 |
| Pokagon RD over Pokagon Creek | Poor condition + traffic exposure | Poor | 2,590 | 1960 |
| Middle Crossing RD over Dowagiac River | Poor condition + traffic exposure | Poor | 1,688 | 1961 |
| Indian Lake Road over Dowagiac River | Poor condition + traffic exposure | Poor | 991 | 1959 |
| North Shore Drive over Christiana Creek | Poor condition + traffic exposure | Poor | 146 | 1930 |
| Thomson RD over Abandoned Rr Row | Poor condition + traffic exposure | Poor | 30 | 1919 |
| M-51 over Dowagiac River | Scour-critical foundation rating | Fair | 6,146 | 1952 |
| M-62 over Dowagiac River | Scour-critical foundation rating | Fair | 5,743 | 1953 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.