Hazard from the Sky?

helicopter aerial groundwater survey (photo from EGLE)

primarily from a news release of EGLE

Hikers and other people working or recreating outdoors may see low-flying helicopters over the 16 southwest counties of Michigan from April through the summer of 2026.

Low-flying helicopters with strange-looking equipment will soon soar over 16 counties in Southwest Michigan to help scientists better understand and protect Michigan’s groundwater. Led by the USGS Water Resources Survey and EGLE, the survey uses airborne technology to map underground geology and aquifers. This reveals how much groundwater exists, how it moves, and how it connects to rivers and streams—supporting better-informed decisions about managing Michigan’s water.

Groundwater supplies drinking water for millions, supports agriculture, and keeps rivers flowing. While Michigan’s reserves are massive—comparable to a “sixth Great Lake”—they’re not unlimited. This work provides the data needed to manage this vital resource for the long term.

The daylight-only flights completed by specially trained pilots will avoid densely populated areas and will not pass over buildings at low altitude. The work poses no risk to humans, animals, or plant life and does not collect photos or videos.

The cooperative study is expected to provide a better understanding of bedrock depth and give us additional data about aquifer systems in southwest Michigan, which will result in better informed decisions about managing Michigan’s groundwater resources.

Personal note from jhy: I was hiking beneath a helicopter-towed aerial trimming saw a few years ago. That certainly did not feel safe, but this apparatus should not cause any distress for hikers, bikers, or paddlers.

See the link above for more, and a map of the survey area.


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