Founder Effect. The Founder Effect is defined as a type of bottleneck, a type of genetic drift describing the loss of the allelic variation that accompanies founding of a new population from a very small number of individuals (a small sample of a much larger source population).
For example, two well drilling companies -- one in Pennsylvania and one that covers New Hampshire, Vermont and central Massachusetts -- state the cost for drilling a well and outfitting it with pump equipment averages between $5,000 and $7,000, at the time of publication.
Total cost for the well drilling and casing came just under $11000. The pump, pressure tank, etc added up to another $4000. I wish I knew before buying the land it would be so costly. At the very least, the estimates I received prior to drilling were accurate.