The soils in the Palouse region in and near Idaho’s panhandle are well suited for conventional septic systems. Still, Tyson Koehn, owner of Palouse Valley Septic Service in Princeton, Idaho, uses plastic chambers for nearly all drainfields. That’s because the hilly terrain and wooded building sites make pipe-and-rock systems difficult to install.
“You dump your rock and park everything above the house or out beside the road, and then you have to cart everything down the hill, so you get a lot of labor and machine time involved with pipe-and-rock systems,” Koehn says. “With chambers, we carry them in or drag
