I will be very interested in what you do with your pond. I live in SE Pennsylvania and have almost the exact same situation as you: recently purchased land with a 2 acre pond, spring fed, 1-1/2 to 2 feet of muck, water level 2-3 feet below original level, old drain pipe. I talked with 1 contractor who charged by the hour. He wanted to cut the dam to drain it and then push the muck out of it through the cut dam. He didn't want to put a number on it but said it could cost me up to $100,000 to do the job!!
