Bridge Safety in Iowa

23,716 bridges, 4,423 Poor condition, avg age 45 years.

Bridge Inventory

Total Bridges23,716
Good Condition9,329
Fair Condition9,964
Poor Condition4,423
Oldest BridgeBuilt 1876
Average Age45 years

Condition Summary

% Good39.3%
% Fair42.0%
% Poor18.6%

Highest-Traffic Poor Condition Bridges in Iowa

Poor condition bridges sorted by daily traffic, the most urgent safety concerns.

Bridge Condition Year Built ADT Length
MISS RVR RR & IA 461 Poor 1940 26,500 -
BNSF RVR STS & IA 376 Poor 1936 20,600 -
SUGAR CREEK Poor 1960 18,050 -
OLD UP RR & SW 22ND Poor 1936 15,634 -
DUCK CREEK Poor 1900 15,300 -
CHERRY RR MLK PKWY Poor 1967 14,108 -
RALSTON CREEK Poor 1972 14,025 -
STREAM Poor 1926 14,000 -
IOWA 21 Poor 1963 13,300 -
RACCOON RIVER & TRAIL Poor 1967 12,809 -
DRY CREEK Poor 1915 10,953 -
IOWA RIVER Poor 1915 10,950 -
INDIAN CREEK Poor 1988 10,789 -
LINN CREEK Poor 1951 10,448 -
CEDAR RIVER & RR Poor 1969 10,268 -
GOOSE CREEK Poor 1978 10,200 -
OVER CC RR Poor 1968 9,703 -
RR AND MADISON ST Poor 1951 9,491 -
CEDAR RIVER Poor 1938 9,382 -
FLOYD RIVER Poor 1962 8,957 -

Oldest Bridges in Iowa

Bridge Condition Year Built Age ADT
SKUNK RIVER Poor 1876 150 yrs 11
BR DES MOINES RIVER Poor 1878 148 yrs 21
WAPSIPINICON RIVER Poor 1879 147 yrs 140
UPPER IOWA RIVER Poor 1880 146 yrs 26
DES MOINES ST Fair 1882 144 yrs 565
NORTH RACCOON RIVER Poor 1882 144 yrs 153
DD 81 Fair 1882 144 yrs 46
SMALL CREEK Poor 1886 140 yrs 3,705
TURKEY RIVER Fair 1889 137 yrs 4,755
BEAVER CREEK Poor 1890 136 yrs 21

Bridge Safety in Iowa

Bridge condition data for Iowa comes from the FHWA National Bridge Inventory. All publicly accessible bridges with a span over 20 feet are inspected at least every 24 months by certified bridge inspectors.