If it is 25 ft deep and 3 run for every rise and a perfect circle 100 ft in radius the sloping sides will be 75 ft of run and 25 ft of rise with a 25 ft diameter flat bottom.

25+
8.33 =
33.33 height
100 radius
349030.9438 cone volume


25/3 = 8.33 height
25 radius
5451.972251 cone volume

349030.9438 - 5451.972251
343578.9716 cuft
12725.1471 cuyd

found some more time... and I was bored.


Note: This is if the pond is round. If your pond is square, the above 125x125x25 is a good estimate of 14,468 cu yd.

Last edited by DMRBG; 06/01/12 03:08 PM.