Aside from these general classes of activities, some areas in the valley pose site-specific risks. The Highway Pond gravel pit is one such example. At this location, the water table is exposed when the ground water table rises.

This photo shows the Highway Pond in 1996, the most recent time the water table rose significantly. The water visible here and in subsequent photos is part of the aquifer and is constantly moving through the Pond from roughly southeast to northwest. Therefore, any contaminant introduced in the Highway Pond will enter the municipal water supply. Note that recreationalists have direct access to the water table, and that automobiles are driven near and, in some cases, into the water.