Niagara County Bridge Report Card
Niagara County scores 76 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Niagara County, New York
Niagara County has 267 bridges in the National Bridge Inventory, with 24 rated poor and 2 rated scour-critical. Its poor-condition share of 9.0% is at or below the 9.9% statewide average. Poor-condition bridges carry about 44,565 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Niagara County a Bridge Condition Exposure Score of 76/100 (C). The county has 267 bridges in the National Bridge Inventory, including 24 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 44,565 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 | 9.0% | 18.0 |
| Poor-condition traffic exposure | 25 | 3.4% of measured traffic | 2.5 |
| Scour-critical bridge share | 20 | 0.7% | 1.5 |
| Average age vs national baseline | 10 | 52 years vs 48 nationally | 1.6 |
| Traffic-data completeness | 5 | 1,313,463 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 | 9.0% |
| State Poor-Condition Share | 9.9% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.7% |
| Average Bridge Age | 52 years |
| Poor-Condition Traffic Exposure | 44,565 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Niagara County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| RTE I190 over RTE 104 | Poor condition + traffic exposure | Poor | 11,962 | 1962 |
| Main Street over Erie Canal | Poor condition + traffic exposure | Poor | 7,684 | 1912 |
| RTE 104 over Eighteenmile Creek | Poor condition + traffic exposure | Poor | 6,759 | 1929 |
| Gasport Road over Eighteen Mile Crk | Poor condition + traffic exposure | Poor | 4,212 | 1916 |
| RTE 957a over Rock Cut | Poor condition + traffic exposure | Poor | 2,162 | 1963 |
| RTE 18 over Twelve Mile Creek | Poor condition + traffic exposure | Poor | 2,101 | 1930 |
| RTE 93 over Tonawanda Creek | Poor condition + traffic exposure | Poor | 2,052 | 1960 |
| RTE 77 over Eighteen Mile Creek | Poor condition + traffic exposure | Poor | 1,780 | 1918 |
| Plaza Drive over Bergholtz Creek | Poor condition + traffic exposure | Poor | 1,287 | 1981 |
| RTE 271 over Erie Canal | Poor condition + traffic exposure | Poor | 866 | 1915 |
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.