State Overview · 2025 Data
South Dakota Bridge Conditions
South Dakota has 5.9K bridges in the FHWA National Bridge Inventory. 2.6K (43.5%) are structurally deficient. Average bridge age is 50 years with an average Condition Score of 44/100.
5.9K
Total Bridges
43.5%
Deficient
50 yrs
Avg Age
44
Avg Score