There is an incredible amount of dirt to haul out of a pond that size depending on how deep you want it. If you have a place close by to dump the dirt I would be looking to pay 25-35K or I'd be talking to the next guy. On my lake the quotes ranged from 23k to 200k+ for a 8 acre lake. Luckly the guy I wanted all along was 23K which makes me think the 200k+ guy didn't really have a clue what he was getting into.