Manistee County Bridge Report Card
Manistee County scores 47 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Manistee County, Michigan
Manistee County has 35 bridges in the National Bridge Inventory, with 5 rated poor and 4 rated scour-critical. Its poor-condition share of 14.3% is above the 11.0% statewide average. Poor-condition bridges carry about 3,076 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Manistee County a Bridge Condition Exposure Score of 47/100 (F). The county has 35 bridges in the National Bridge Inventory, including 5 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 3,076 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 | 14.3% | 28.6 |
| Poor-condition traffic exposure | 25 | 5.5% of measured traffic | 4.1 |
| Scour-critical bridge share | 20 | 11.4% | 20.0 |
| Average age vs national baseline | 10 | 46 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 55,951 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 | 14.3% |
| State Poor-Condition Share | 11.0% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 11.4% |
| Average Bridge Age | 46 years |
| Poor-Condition Traffic Exposure | 3,076 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Manistee County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Leffew Road over Big Bear Creek | Poor condition + traffic exposure | Poor | 10 | 1910 |
| Nine Mile Road over Big Bear Creek | Poor condition + traffic exposure | Poor | 2,006 | 1977 |
| Kurick Road over Betsie River | Poor condition + traffic exposure | Poor | 760 | 1974 |
| Kerry Road over Big Bear Creek | Poor condition + traffic exposure | Poor | 200 | 1972 |
| Psutka Road over Betsie River | Poor condition + traffic exposure | Poor | 100 | 1900 |
| Us-31 over Manistee River | Scour-critical foundation rating | Fair | 17,789 | 1933 |
| M-55 over Pine Creek | Scour-critical foundation rating | Fair | 4,202 | 1932 |
| Coates Highway over Big Bear Creek | Scour-critical foundation rating | Fair | 900 | 1958 |
| M-115 over Betsie River | High traffic | Fair | 4,219 | 1940 |
| M-55 over Manistee River | High traffic | Good | 3,408 | 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.