D.M. official: Dico site expected to be cleaned up by end of year But even when cleaned, âit will still be a Superfund siteâ Friday, April 30, 2021 3:43 PM Cleanup of the contaminated Dico site at 200 S.W. 16th St. in Des Moines is expected to be completed by the end of the year, a city official said. Photo by Duane Tinkey Cleanup is expected to be completed by year’s end on a 43-acre toxic site located near a prominent entryway into downtown Des Moines, city officials said during a public meeting today. In addition, the city of Des Moines will likely take possession of the former Dico site in about 30 days, officials said.