*Unusual Helicopter Flights Coming to 16 Michigan Counties for Groundwater Mapping Study*
Residents across Southwest Michigan may notice something unfamiliar in the sky starting in late April and continuing through most of the summer months.
Helicopters will be flying approximately 200 feet from the ground over 16 different counties, carrying specialized equipment that looks like a large hoop hanging from a cable.
What Is Happening
This is a legitimate scientific survey conducted by the U.S. Geological Survey in collaboration with the Michigan Department of Environment, Great Lakes and Energy.
The purpose is to map geology and aquifers across the region to better understand the amount and movement of groundwater.
The helicopter flights will cover all or part of the following counties:
- Allegan
- Barry
- Berrien
- Branch
- Calhoun
- Cass
- Eaton
- Hillsdale
- Ingham
- Ionia
- Jackson
- Kalamazoo
- Kent
- Ottawa
- St. Joseph
- Van Buren
How Low Will They Be Flying
These helicopters will fly about 200 feet from the ground, which may seem uncomfortably close to residents.
Hanging approximately 100 feet below the helicopter will be a giant hoop-like frame on a cable. This electromagnetic instrument helps measure differences in Earth's electrical properties and magnetic field created by different rock types.
The data gathered from these measurements helps scientists understand the amount and movement of groundwater beneath the surface.
Why This Survey Matters
Groundwater is a critical resource for communities across Southwest Michigan. Understanding its distribution and movement helps with:
- Water resource management
- Agricultural planning
- Infrastructure development
- Environmental protection
This type of survey is conducted periodically to gather updated geological data that can inform long-term planning decisions.
Safety and Privacy
The survey flights are completely safe and pose no risk to buildings or people on the ground. The electromagnetic equipment is designed to measure geological properties from the air and does not interfere with normal activities below.
The survey is non-invasive and does not collect any personal information about residents or properties.
When To Expect Flights
According to the Michigan Department of Environment, Great Lakes and Energy, the helicopter flights will begin in late April and continue through most of the summer months.
Residents may start noticing these unusual flights around April 20 and see them regularly throughout the summer season.
About the Survey
The airborne electromagnetic surveys are a standard scientific method used by geologists to map subsurface geological features. Similar surveys have been conducted in other parts of the country to understand groundwater resources and geological formations.
This project represents an investment in understanding a critical natural resource that supports communities, agriculture, and industry across Southwest Michigan.
Additional Information
Residents who want more information about the survey can contact the Michigan Department of Environment, Great Lakes and Energy groundwater data unit.
The survey will help Michigan maintain accurate geological maps that support sustainable water resource management for years to come.