Approximately 6.5 acres remain vacant between Harrison and Polk; the site currently serves as a de facto dog park in the South Loop. In 1984, developers began construction of River City, just south of the site. River City was intended to be a complex of four 85-story office and residential towers stretching along the Chicago River from Harrison to Roosevelt Road designed by Bertrand Goldberg, designer of the landmark "Marina City" along the main branch of the Chicago River). Only a 17-story apartment building was completed in 1986, however it can accommodate additional floors as part of an expansion. Several other plans for office towers, condominiums, or retail development on the site have all been proposed over the past several years, and all have been shelved.