Montcalm County Bridge Report Card
Montcalm County scores 71 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Montcalm County, Michigan
Montcalm County has 121 bridges in the National Bridge Inventory, with 7 rated poor and 10 rated scour-critical. Its poor-condition share of 5.8% is at or below the 11.0% statewide average. Poor-condition bridges carry about 1,108 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Montcalm County a Bridge Condition Exposure Score of 71/100 (C). The county has 121 bridges in the National Bridge Inventory, including 7 in poor condition and 10 rated scour-critical. Poor-condition bridges carry about 1,108 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 | 5.8% | 11.6 |
| Poor-condition traffic exposure | 25 | 0.3% of measured traffic | 0.2 |
| Scour-critical bridge share | 20 | 8.3% | 16.5 |
| Average age vs national baseline | 10 | 49 years vs 48 nationally | 0.4 |
| Traffic-data completeness | 5 | 340,980 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 | 5.8% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 8.3% |
| Average Bridge Age | 49 years |
| Poor-Condition Traffic Exposure | 1,108 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Montcalm County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Tamarack Road over Tamarack Creek | Poor condition + traffic exposure | Poor | 57 | 1998 |
| Pine Grove Road over S Branch Pine River | Poor condition + traffic exposure | Poor | 333 | 1920 |
| Nimberger Road over Tamarack Creek | Poor condition + traffic exposure | Poor | 283 | 1980 |
| Tamarack Road over Pine River | Poor condition + traffic exposure | Poor | 269 | 1978 |
| Stevenson Road over W Br Fish Creek | Poor condition + traffic exposure | Poor | 105 | 1970 |
| Amsden Road over Dickerson Creek | Poor condition + traffic exposure | Poor | 37 | 1905 |
| Nelson Road over Dickerson Creek | Poor condition + traffic exposure | Poor | 24 | 1910 |
| M-91 over Wabasis Creek | Scour-critical foundation rating | Fair | 9,376 | 1957 |
| M-46 over Tamarack Creek | Scour-critical foundation rating | Fair | 6,904 | 1960 |
| Old M-82 over Tamarack CR | Scour-critical foundation rating | Fair | 5,843 | 1957 |
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.