Kim Haru wasn't sure about the soil's ability to support weight above the tunnel, so he marked the path with small sticks, intending to reinforce it later with stone slabs or something similar.
Otherwise, if the soil turned out to be too soft and someone were to step over it only to fall through into pig manure… well, that experience would not be pleasant.
With the tunnel in place, Kim Haru decided the pigpen's layout needed slight adjustments too. He shaved down the area surrounding the tunnel entrance, creating a slope to channel waste directly toward the compost pit. This way, the waste would flow conveniently into the pit, and if it didn't, it would be easy to wash down with water.
With this last touch, the initial setup for the fertilizer production was complete.
