Louisa County Bridge Report Card

Louisa County scores 68 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D68 / 100

Local infrastructure snapshot

Louisa County, Iowa

Louisa County has 151 bridges in the National Bridge Inventory, with 22 rated poor and 1 rated scour-critical. Its poor-condition share of 14.6% is at or below the 18.6% statewide average. Poor-condition bridges carry about 2,848 daily vehicle crossings.

151Total Bridges

22Poor (14.6%)

81Fair (53.6%)

1Scour-Critical

Quote-Ready Local Facts

14.6%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

2,848daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Louisa County a Bridge Condition Exposure Score of 68/100 (D). The county has 151 bridges in the National Bridge Inventory, including 22 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 2,848 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	14.6%	29.1
Poor-condition traffic exposure	25	2.5% of measured traffic	1.9
Scour-critical bridge share	20	0.7%	1.3
Average age vs national baseline	10	45 years vs 48 nationally	0.0
Traffic-data completeness	5	112,123 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	14.6%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.7%
Average Bridge Age	45 years
Poor-Condition Traffic Exposure	2,848 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeLinn ST over Indian Creek — 780 vehicles/day Oldest Listed BridgeV AVE over Buffington Creek — built in 1893 All County BridgesBrowse every bridge record in Louisa County.

Top Bridges to Watch in Louisa County

Bridge	Reason	Condition	Daily Traffic	Year Built
V AVE over Buffington Creek	Poor condition + traffic exposure	Poor	11	1893
Linn ST over Indian Creek	Poor condition + traffic exposure	Poor	780	1986
FM over Small Stream	Poor condition + traffic exposure	Poor	660	1960
FM over Sm Stream	Poor condition + traffic exposure	Poor	490	1950
FM over Long Creek	Poor condition + traffic exposure	Poor	250	1963
Manor RD over Drainage	Poor condition + traffic exposure	Poor	144	1920
FM over Otter CR	Poor condition + traffic exposure	Poor	80	1959
Local over Indian Creek	Poor condition + traffic exposure	Poor	62	1969
Local over Small Stream	Poor condition + traffic exposure	Poor	51	1974
Local over Small Stream	Poor condition + traffic exposure	Poor	47	1943

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.