depending on what you have for machinery a good way to get across is with the bore attachment on the front of the trencher dig to required depth on the one side about ten feet long then bore through to a good sized pot hole on the other side.you cant really track the head very well but if you go slow and let the head do its job you will hit your target.sound hard and time consuming but actually quick and easy.to get product through hole either tape the and push through or do the tape rope to bore head and dead pull back.