Meanwhile, the city of Emeryville had adopted a General Plan in 1966, calling for a significant expansion of Emeryville west of I-80 into San Francisco Bay on the Emeryville Peninsula, to be constructed on 400 acres of new fill along an extension of Powell Street; the "Tidelands" area created in western Emeryville would include waterways, lagoons, parks, new office spaces, and high density residential developments to attract businesses and residences.