Sac County Bridge Report Card

Sac County scores 52 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F52 / 100

Local infrastructure snapshot

Sac County, Iowa

Sac County has 221 bridges in the National Bridge Inventory, with 65 rated poor and 0 rated scour-critical. Its poor-condition share of 29.4% is above the 18.6% statewide average. Poor-condition bridges carry about 7,790 daily vehicle crossings.

221Total Bridges

65Poor (29.4%)

71Fair (32.1%)

0Scour-Critical

Quote-Ready Local Facts

29.4%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

7,790daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Sac County a Bridge Condition Exposure Score of 52/100 (F). The county has 221 bridges in the National Bridge Inventory, including 65 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 7,790 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	29.4%	40.0
Poor-condition traffic exposure	25	9.2% of measured traffic	6.9
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	50 years vs 48 nationally	0.9
Traffic-data completeness	5	84,727 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	29.4%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	50 years
Poor-Condition Traffic Exposure	7,790 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeNeedham AVE over Small Natural Stream — 1,117 vehicles/day Oldest Listed BridgeWillow ST over Drainage — built in 1900 All County BridgesBrowse every bridge record in Sac County.

Top Bridges to Watch in Sac County

Bridge	Reason	Condition	Daily Traffic	Year Built
Needham AVE over Small Natural Stream	Poor condition + traffic exposure	Poor	1,117	1939
FM over Indian Creek	Poor condition + traffic exposure	Poor	938	1969
255th ST over Little Indian Creek	Poor condition + traffic exposure	Poor	928	1968
FM over Boyer River	Poor condition + traffic exposure	Poor	848	1956
High ST over Drainage	Poor condition + traffic exposure	Poor	479	1968
FM over Raccoon River	Poor condition + traffic exposure	Poor	290	1965
D15 190th ST over Boyer River	Poor condition + traffic exposure	Poor	280	1964
FM over No Name Creek	Poor condition + traffic exposure	Poor	249	1925
FM over Overflow On Boyer River	Poor condition + traffic exposure	Poor	249	1964
Willow ST over Drainage	Poor condition + traffic exposure	Poor	232	1900

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.