Ottawa County Bridge Report Card

Ottawa County scores 61 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D61 / 100

Local infrastructure snapshot

Ottawa County, Michigan

Ottawa County has 253 bridges in the National Bridge Inventory, with 23 rated poor and 23 rated scour-critical. Its poor-condition share of 9.1% is at or below the 11.0% statewide average. Poor-condition bridges carry about 88,248 daily vehicle crossings.

253Total Bridges

23Poor (9.1%)

151Fair (59.7%)

23Scour-Critical

Quote-Ready Local Facts

9.1%of county bridges are in poor condition, compared with 11.0% statewide and 6.7% nationally.

88,248daily vehicle crossings are on poor-condition bridges in the county.

23bridges are rated scour-critical, or 9.1% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Ottawa County a Bridge Condition Exposure Score of 61/100 (D). The county has 253 bridges in the National Bridge Inventory, including 23 in poor condition and 23 rated scour-critical. Poor-condition bridges carry about 88,248 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	9.1%	18.2
Poor-condition traffic exposure	25	3.3% of measured traffic	2.5
Scour-critical bridge share	20	9.1%	18.2
Average age vs national baseline	10	49 years vs 48 nationally	0.4
Traffic-data completeness	5	2,669,820 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	9.1%
State Poor-Condition Share	11.0%
National Poor-Condition Share	6.7%
County Scour-Critical Share	9.1%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	88,248 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeRiley ST over Pine Creek — 13,227 vehicles/day Oldest Listed BridgeSouth Shore Drive over Montello Park Drain — built in 1900 All County BridgesBrowse every bridge record in Ottawa County.

Top Bridges to Watch in Ottawa County

Bridge	Reason	Condition	Daily Traffic	Year Built
Randall Street over Deer Creek	Poor condition + traffic exposure	Poor	6,976	1920
Main St. over Deer Creek	Poor condition + traffic exposure	Poor	1,528	1920
Riley ST over Pine Creek	Poor condition + traffic exposure	Poor	13,227	1972
96th Avenue over Pigeon Creek	Poor condition + traffic exposure	Poor	7,380	1973
Adams ST over Black River Tributary	Poor condition + traffic exposure	Poor	6,930	1973
Adams Street over Black River Tributary	Poor condition + traffic exposure	Poor	6,840	1973
Byron Road over Kampen-struik Drain	Poor condition + traffic exposure	Poor	5,810	1980
West Spring Lake R over Smith Bayou	Poor condition + traffic exposure	Poor	5,424	1972
96th Avenue over Bass River	Poor condition + traffic exposure	Poor	5,360	1973
104th AVE over Black Creek	Poor condition + traffic exposure	Poor	5,243	1976

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.