Downtown Investment Authority asking for development proposals for former Jacksonville Landing site The city's Downtown development group issued a request for proposals for design firms to develop "a vibrant and iconic public space" at the former Landing site. Credit: Downtown Investment Authority The Jacksonville Downtown Investment Authority is asking for development proposals for the former site of the Jacksonville Landing. Author: Mindy Wadley Updated: 10:26 AM EST January 21, 2021 JACKSONVILLE, Fla — The City of Jacksonville's Downtown Investment Authority is searching for a design firm to develop a plan for the future of Riverfront Plaza, the new name for the former Jacksonville Landing site.