Allegan County Bridge Report Card

Allegan County scores 40 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F40 / 100

Local infrastructure snapshot

Allegan County, Michigan

Allegan County has 245 bridges in the National Bridge Inventory, with 41 rated poor and 24 rated scour-critical. Its poor-condition share of 16.7% is above the 11.0% statewide average. Poor-condition bridges carry about 82,809 daily vehicle crossings.

245Total Bridges

41Poor (16.7%)

144Fair (58.8%)

24Scour-Critical

Quote-Ready Local Facts

16.7%of county bridges are in poor condition, compared with 11.0% statewide and 6.7% nationally.

82,809daily vehicle crossings are on poor-condition bridges in the county.

24bridges are rated scour-critical, or 9.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Allegan County a Bridge Condition Exposure Score of 40/100 (F). The county has 245 bridges in the National Bridge Inventory, including 41 in poor condition and 24 rated scour-critical. Poor-condition bridges carry about 82,809 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	16.7%	33.5
Poor-condition traffic exposure	25	8.9% of measured traffic	6.7
Scour-critical bridge share	20	9.8%	19.6
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	931,046 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	16.7%
State Poor-Condition Share	11.0%
National Poor-Condition Share	6.7%
County Scour-Critical Share	9.8%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	82,809 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUs-131 SB over Grand Elk Rr — 27,941 vehicles/day Oldest Listed BridgeSecond Street over Kalamazoo River — built in 1886 All County BridgesBrowse every bridge record in Allegan County.

Top Bridges to Watch in Allegan County

Bridge	Reason	Condition	Daily Traffic	Year Built
M-40 M-89 over Kalamazoo River	Poor condition + traffic exposure	Poor	8,300	1938
147th AVE over N Br Macatawa River	Poor condition + traffic exposure	Poor	896	1990
46th Street over S Br Macatawa River	Poor condition + traffic exposure	Poor	550	1978
Us-131 SB over Grand Elk Rr	Poor condition + traffic exposure	Poor	27,941	1960
I-196 EB over Csx Rr	Poor condition + traffic exposure	Poor	9,123	1972
142nd AVE over Red Run Drain	Poor condition + traffic exposure	Poor	8,204	1973
18th ST over Red Run Drain	Poor condition + traffic exposure	Poor	7,600	1970
Division Street over Rabbit River	Poor condition + traffic exposure	Poor	3,443	1940
60th Street over Kuipers Drain	Poor condition + traffic exposure	Poor	1,845	1984
144th AVE over Us-131	Poor condition + traffic exposure	Poor	1,812	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.