Montmorency County Bridge Report Card
Montmorency County scores 90 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Montmorency County, Michigan
Montmorency County has 21 bridges in the National Bridge Inventory, with 0 rated poor and 1 rated scour-critical. Its poor-condition share of 0.0% is at or below the 11.0% statewide average.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Montmorency County a Bridge Condition Exposure Score of 90/100 (A). The county has 21 bridges in the National Bridge Inventory, including 0 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 0 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 | 0.0% | 0.0 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 4.8% | 9.5 |
| Average age vs national baseline | 10 | 30 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 22,235 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 | 0.0% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 4.8% |
| Average Bridge Age | 30 years |
| Poor-Condition Traffic Exposure | 0 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Montmorency County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| M-32 over Thunder Bay River | Scour-critical foundation rating | Fair | 4,572 | 1927 |
| M-32 Bs|s State ST over Thunder Bay River | High traffic | Fair | 6,400 | 2009 |
| M-32 over Miller Creek | High traffic | Fair | 4,572 | 1991 |
| Co Road 451 over N Br Thunder Bay River | High traffic | Fair | 2,126 | 1994 |
| M-33 over Gilchrist Creek | High traffic | Fair | 1,647 | 1951 |
| M-33 over Thunder Bay River | High traffic | Fair | 1,647 | 1968 |
| Airport Road over Thunder Bay River | High traffic | Good | 160 | 1969 |
| Hubert Road over N Br Thunder Bay River | High traffic | Fair | 150 | 1994 |
| Harwood Road over Gilchrist Creek | High traffic | Good | 150 | 2020 |
| Carter RD over Gilchrist Creek | High traffic | Good | 150 | 2021 |
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.