Planning and development of the downtown core area was one of the principle program areas for DCD. Most of these records relate to the physical development of downtown, but also touch on economic development issues and downtown neighborhood preservation. Major topics include the development of the Denny Regrade area, renovation and revitalization of Union Station and the Union Station corridor, preservation and development in Pioneer Square and the International District, and planning for the central waterfront. Among the issues addressed for most of these topics were downtown transportation, parking policies, stadium construction, street populations, mitigation related to transit and transportation projects, and the development of downtown institutions such as the Seattle Art Museum and the Seattle Aquarium.