We have found only one sure way of using HDD to install sewers and it can be found at the inventors name on Google. Try these key words for more information,
Ted Dimitroff, ArrowBore, Trenchless Flowline.
Very flat grades below .50% in water table conditions have been done many times.
I hope...
HDD of sewer is now availble at tight grades (.20% and up) a project is being done in high water table sand conditions in Fort Lauderdale and another starting in St. Louis using the ArrowBore HDD process. I found the information on Google by searching the inventors name Ted Dimitroff or the...