Manitowoc County Bridge Report Card

Manitowoc County scores 85 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B85 / 100

Local infrastructure snapshot

Manitowoc County, Wisconsin

Manitowoc County has 277 bridges in the National Bridge Inventory, with 13 rated poor and 5 rated scour-critical. Its poor-condition share of 4.7% is at or below the 6.7% statewide average. Poor-condition bridges carry about 25,005 daily vehicle crossings.

277Total Bridges

13Poor (4.7%)

142Fair (51.3%)

5Scour-Critical

Quote-Ready Local Facts

4.7%of county bridges are in poor condition, compared with 6.7% statewide and 6.7% nationally.

25,005daily vehicle crossings are on poor-condition bridges in the county.

5bridges are rated scour-critical, or 1.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Manitowoc County a Bridge Condition Exposure Score of 85/100 (B). The county has 277 bridges in the National Bridge Inventory, including 13 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 25,005 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	4.7%	9.4
Poor-condition traffic exposure	25	2.5% of measured traffic	1.8
Scour-critical bridge share	20	1.8%	3.6
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	1,015,087 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	4.7%
State Poor-Condition Share	6.7%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.8%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	25,005 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeSth 42 over Manitowoc River — 10,900 vehicles/day Oldest Listed BridgeLrd Old Wooden Bri over Cn Rr — built in 1900 All County BridgesBrowse every bridge record in Manitowoc County.

Top Bridges to Watch in Manitowoc County

Bridge	Reason	Condition	Daily Traffic	Year Built
Lrd Marquette RD over Mud Creek	Poor condition + traffic exposure	Poor	75	1930
Sth 42 over Manitowoc River	Poor condition + traffic exposure	Poor	10,900	1987
Sth 32-sth 57 over Sheboygan River	Poor condition + traffic exposure	Poor	3,200	1958
Cth Q over Little Manitowoc River	Poor condition + traffic exposure	Poor	3,000	1958
Cth Q over Br W Twin River	Poor condition + traffic exposure	Poor	2,250	1964
Cth Cs over Silver Creek	Poor condition + traffic exposure	Poor	1,800	1969
Cth Q over W Twin River	Poor condition + traffic exposure	Poor	1,300	1939
Cth Xx Washington over Br Centerville Creek	Poor condition + traffic exposure	Poor	795	1917
Cth K over Mud Creek	Poor condition + traffic exposure	Poor	780	1970
Lrd Taus Road over Mud Creek	Poor condition + traffic exposure	Poor	675	1962

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.