Interesting evolution of the the pond.... The fire chief wanted me to bury a 40,000 gallon tank in the parking lot so there would be water onsite should there be a fire. After running the numbers, I asked my excavation contractor what the cost would be to dig out the pond, which I knew was all in clay. It was a 10th of the cost of the buried tank and the town thought it was a great idea. The pond was actually designed by a state fisheries employee. What you do not see is the smaller pond that is connected to the large pond with a 4" pipe. During a heavy rain, the maximum amount of water that will flow into the pond is whatever will fit through the pipe. the rest overflows into a swale that goes around the pond. since last fall, it has been a steady flow of 7000 gallons of spring water a day...