MnDOT Seeks to Use Drones for Bridge Inspection

October 6, 2015

The Minnesota Department of Transportation (MnDOT) completed the first portion of a two-phase study to determine if unmanned aerial vehicles (UAVs) could effectively inspect bridges by gathering close-up imagery of structural flaws, reports MPR News.

According to MnDOT bridge engineer Jennifer Zink, UAVs help access confined spaces that aren’t safe for inspectors to conduct their assessments using traditional methods.

The first phase found the technology was able to gather the same data as traditional methods of inspections from the ground using trucks, ladders and lifts.

MnDOT will conduct the second phase of the study in November by testing drones on the Blatnik Bridge in Duluth, Minn.

The department spent approximately $35,000 on the first phase of the study and plans to spend around $75,000 from research funds for the second phase. 

MnDOT is responsible for inspecting more than 20,000 bridges and over 4,500 trunk highway bridges during the inspection season, which runs from April through the end of October.