i live in pennsylvania and would like to build a pond for multiple uses. we have property where i could locate a pond at an elevation of 15-25 feet above my house level. there is a spring/muddy spot there most of the year unless it gets really dry. it is located at the bottom of another rise so i could collect runoff as well. if i farmed fish in it, i have other springs nearby that i could use to fill the pond if need be. my uses would most likely be agricultural irrigation. if the water source would prove to be constant, i would consider generating electricity via hydropower (on a very small scale, i have a stream by the other side of the house that i have considered using for hydropower, i could combine the systems). farming fish or crayfish is another possibility. what regulations are involved? state and or local i would suppose. where do i inquire get info?