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.
The price of a well pump depends on the size and quality of the pump. Installation costs vary based on the depth of the well and local labor rates. Replacement parts like wiring, water pipes and valves - if needed - also affect the total price. A jet pump might cost $300-$500, not including installation.