2014 Watertown Winter Farm Show at the Codington County Extension Complex. Visit the Upper Big Sioux River Watershed Project booth in the 'echo' chamber of the extension building. Our booth's featured displays include a mock-up of the phosphorus removal facility, demos of till/no till soils, and cropped v. grass plantings. Show is open 9 a.m. until 4 p.m. daily Tuesday through Saturday and free to the public.