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.
Meanwhile, prepare for a significant cost if you need a new well pump. It costs about $1,000 to replace and install a pump and related components in a shallow-bored well. For a drilled well, the price may approach $2,000, depending on shaft depth and pump horsepower.