Marquette County Bridge Report Card

Marquette 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

Marquette County, Wisconsin

Marquette County has 81 bridges in the National Bridge Inventory, with 5 rated poor and 1 rated scour-critical. Its poor-condition share of 6.2% is at or below the 6.7% statewide average. Poor-condition bridges carry about 1,818 daily vehicle crossings.

81Total Bridges

5Poor (6.2%)

47Fair (58.0%)

1Scour-Critical

Quote-Ready Local Facts

6.2%of county bridges are in poor condition, compared with 6.7% statewide and 6.7% nationally.

1,818daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 1.2% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Marquette County a Bridge Condition Exposure Score of 85/100 (B). The county has 81 bridges in the National Bridge Inventory, including 5 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 1,818 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	6.2%	12.3
Poor-condition traffic exposure	25	0.7% of measured traffic	0.5
Scour-critical bridge share	20	1.2%	2.5
Average age vs national baseline	10	37 years vs 48 nationally	0.0
Traffic-data completeness	5	274,523 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	6.2%
State Poor-Condition Share	6.7%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.2%
Average Bridge Age	37 years
Poor-Condition Traffic Exposure	1,818 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeCth O over Fox River — 923 vehicles/day Oldest Listed BridgeLrd 14th RD over Cnw Rr — built in 1940 All County BridgesBrowse every bridge record in Marquette County.

Top Bridges to Watch in Marquette County

Bridge	Reason	Condition	Daily Traffic	Year Built
Lrd Dover RD over Mecan River	Poor condition + traffic exposure	Poor	153	1977
Cth O over Fox River	Poor condition + traffic exposure	Poor	923	1961
Cth E over Montello River	Poor condition + traffic exposure	Poor	600	1966
Lrd 14th RD over Cnw Rr	Poor condition + traffic exposure	Poor	95	1940
Lrd 16th RD over Cnw Rr	Poor condition + traffic exposure	Poor	47	1950
IH Ush 51-ih 39 over Chapman Creek	High traffic	Fair	17,800	1985
IH Ush51-ih39 NB over Cth O	High traffic	Fair	15,800	1983
IH Ush51-ih39 SB over Cth O	High traffic	Fair	15,800	1983
IH Ush 51 - IH 39 over Sth 23/82 EB & WB	High traffic	Good	14,700	2016
IH Ush51-ih39 NB over Lrd Dover Court	High traffic	Good	13,000	1987

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.