Borehole Geophysical Database Portal
A clipped example of a gamma log collected by the Minnesota Geological Survey.
The Minnesota Geological Survey's Borehole Geophysical Database (BGD) is a collection of over 7,000 borehole geophysical and video logs of water wells and drill holes throughout Minnesota.
This newly updated portal and web map provides more information about the various geophysical logs we collect, while providing enhanced public access to their spatial location and the ability to view/download pertinent data.
Note: You can also access the portal through our shortened URL: https://z.umn.edu/borehole_geo