SepDig: A Septic Excavation Calculator

Field notes

The interface models a septic layout from the house sewer invert through the pipe run to the tank, with explicit controls for slope, drops, turns, cleanouts, and tank geometry. Its visible example uses a 40-foot run at 2%, a 57-inch inlet, a 54-inch outlet, and a 68-inch tank height, producing a rod reading of 9 feet 6⅝ inches. FullDig and QuickDig modes are exposed alongside reset and copy-cut controls.