Bridge Condition Trends in Iowa

Between 2015 and 2025, bridge conditions in Iowa have improved. The share of bridges rated poor went from 19.5% to 18.6% — a change of -0.8 percentage points.

Condition Summary

YearTotalGoodFairPoorPoor %
201524,2429,31310,2034,71919.5%
202023,9829,30510,1064,57119.1%
202523,7169,3299,9644,42318.6%

Most Improved Counties in Iowa

CountyPoor % (2015)Poor % (2025)Change
Crawford14.6%7.6%-6.9 pp
Mitchell14.4%9.6%-4.8 pp
Dallas12.9%8.7%-4.2 pp
Cerro Gordo7.6%5.2%-2.4 pp
Harrison20.7%18.5%-2.2 pp
Adair13.7%12.2%-1.5 pp
Boone29.7%28.4%-1.3 pp
Story14.4%13.2%-1.2 pp
Marion13.3%12.9%-0.4 pp
Wapello13.4%13.2%-0.3 pp

Counties Where Conditions Worsened

CountyPoor % (2015)Poor % (2025)Change
Buena Vista10.4%34.4%+24.0 pp
Mahaska7.5%30.3%+22.8 pp
Poweshiek17.2%39.1%+21.9 pp
Winnebago8.3%29.6%+21.3 pp
Chickasaw5.5%26.3%+20.8 pp
Fayette7.3%26.8%+19.5 pp
Calhoun5.7%24.7%+19.0 pp
Webster6.3%25.3%+19.0 pp
Hardin9.8%28.6%+18.9 pp
Appanoose11.4%29.2%+17.8 pp

View all Iowa bridges · National trends