A seemingly silly, but somewhat serious hypothetical thought: Perhaps you could have the truck dump portions of the load at various spots along the upwind side of the pond, and when a steady light breeze is blowing use Tannerite explosive placed on the backside of each pile to blow up the pile, creating a cloud of lime which would drift over and into the pond
Disclaimer: I bear no responsibility for unintended damage or harm which may result from misuse of explosives
