Commercial Street is a street downtown Portland, Maine. In 2008, it was named one of the 10 best streets in the United States by the American Planning Association. It was built upon old piers in the 1850s. Fill was pushed into Casco Bay to accommodate the growing railroad and warehousing needs of the port's working waterfront. In the 1970s and 1980s, much of the economic activity on the street was hurt and many of the properties on the street were sold off for non-marine development, including the building of condominiums. In 1987, Portland voters, led by local fisherman based on Commercial Street, halted all non-marine development along the street and adjacent docks. Marine development around Commercial Street returned in the 1990s and 2000s (decade) alongside other economic development,