e,everything i do on my farm i try to work with a hard price.as we speak i'm adding on to the lake,this area will be about 3/4 acre larger and it will cost me $7,000.00.they are running 2 12 yard trucks 9 hour days,1 large track hoe and 1 d6 dozer.it will take them about 3-31/2 days to complete this project.i've added on to this lake 2 other times and 1 time i did not need many truck hours due to we had a levee and dozer's were pushing dirt then 1 time we had 13 dump trucks working in the hole.i have found with a good contractor they will put in 9 hour days with no problem.be very carefull with any job by the hour.these guys know how to do nothing in 8 hours with a rookie watching.good luck.when are you digging your pond?