Site 21AN106 is located in southeastern Anoka County. A volunteer working with the Institute for Minnesota Archaeology first recorded it in 1988. In 1995 archaeologists from IMA Consulting relocated 21AN106 during a survey of the route for a pipeline proposed by Northern Natural Gas Company.
Excavators use a transit to record surface elevations across the site.
The elevations were later used to create a contour map of the site area. Three-dimensional site map of 21AN106 showing the location of 1996 excavation units. Dig On the basis of this information, Minnesota's State Historic Preservation Office decided that 21AN106 was eligible for listing on the National Register of Historic Places. Because the site could not be avoided during pipeline construction, Northern Natural Gas Company sponsored a data recovery excavation there in 1996. No license was required, since it was on private land and permission was received from the landowner.