I have an option of taking on a job I've never done before. It includes digging out a wet marshy area to make a pond. Pond would be about 40 feet across. Also need to trench out a feeder stream that is about 300 feet long. It probably should be trenched about 6 feet wide and 3feet deep. The excess soil should be bermed or spread out around the area after digging. Is there one machine (eg. case 580) that can do this or will a have to use an excavator, dozer or some other combination. Thanks!