The Busch Sewage Treatment Plant adds a common scene to your HO Scale layout. Based on a typical small water treatment installation as used for municipal purposes and at industries that treat their own wastewater, the kit includes a pump house, the combination settling and clarifying pond features realistically colored water. The Sewage Treatment Plant features pre-colored laser-cut cardstock parts, provisions for adding interior lights (sold separately) and complete instructions. It's one of many