Our pond was built in the late '70s. It is 4 or 5 acres, spring fed, and approx. 15 to 20 feet deep. About 5 years ago there was a leak and just about all of the water drained out. Come to find out the pipe that runs through the bottom of the dam to the drain valve rusted through. There is a "T" in the horizontal pipe with a pipe running vertically to the desired water level that acted as an overflow. The leak was on the horizontal pipe between the "T" and the valve. We sealed off the valve side of the "T" leaving a 90 degree elbow running up to the overflow. Apparently this worked b/c the pond level rose a considerable amount, but is still about 4 feet lower than rhe pre-leak level. We just recently sealed off the "T" by dumping quickcrete down the vertical overflow pipe. Apparently this worked b/c the overflow pipe is now full of water, but it did not solve the problem b/c the pond remains at the same level. Water is still coming from the pipe in the backside of the dam. Seems like our only option is to try plugging from the pipe on the backside of the dam. Any suggestions?
