My mole calls typically increase with dry conditions. As Josh noted, the mounds are now huge due to the amount of soil they must excavate to reach the food source. This lawn had about 20 of these mounds. Previously just a few surface runs, which the folks tolerated as they could still mow the lawn. Can't mow through a foot of dirt.
I am so busy now with bat inspections and preliminary bat-proofing that I don't have much time for mole jobs, but still do a few each week. The garden knife gets used very little for cutting trap beds.... time for the tile spade. Most traps are 8 to 14 inches deep.