I finally dug my trench to the river. My 35TLB dug a 5.5 ft deep x150ft long trench with the 12" bucket. I tied a 4" line into my sumpump pit and ran it down to the river bank so even if the power goes out it should gravity drain. Almost forgot the gravity check valve to keep the cold air out in the winter. I also ran a 4" sock covered perferated line to pick up the ground water. After filling half the hole I ran a 4" line for my gutters. The water table can get pretty high in the wet season and I recently had 10" of water in my crawl space because we lost power for 2 days because of storms. I have much respect for those that operate equipment for a living. That was the second big job performed by my 35TLB and the first with the backhoe. I was amazed at the power of the Kubota. After 3 feet deep its all rocks some twice the size of a basketball. They were easy prey for the bucket. I purchased my 2001 unit 2 years ago and feared a breakdown halfway through the job but the old work horse (1054 hr) completed the job without a problem. That was quite a feat for about 15 gallons of diesel. Previous posted articals about trenching were my inspiration. Thanks for educating a amateur.