</font><font color="blue" class="small">( Driving a CUT, truck, auto, or any other heavy vehicle over any part of any septic system is NOT to be recommended.)</font>
Proven over and over again NOT to be true. It all depends on the design of your system and how far under the surface the drain lines are. I have driven vehicles including dozers over my raised bed septic system for the last 27 years and have had no problems.
Septic systems can also be designed to be under a driveway. I have seen plenty of those type of systems near where I live. Mine would have been one of those but the water table is to high.
It's the design baby, the design. /forums/images/graemlins/grin.gif