By the mid-1970s, Lowell's population had fallen to 91,000, and 12% of residents were unemployed. The industrial economy of the city had been reduced to many smaller scale, marginal businesses. The city's infrastructure and buildings were largely over one hundred years old, obsolete and decaying, often abandoned and in foreclosure. Urban renewal demolished many historic structures in a desperate attempt to improve the overall situation in Lowell. In 1939, the Greek Acre was the first district in the nation to face "slum clearance" with Federal Urban Renewal money. In the late 1950s, Little Canada was bulldozed. In 1960, the Merrimack Manufacturing Company's millyard and boardinghouses were demolished to make way for warehouses and public housing projects. Other neighborhoods like Hale-Howard between Thorndike and Chelmsford Streets, and an area between Gorham and South Streets, were cleared as well. Arson became a serious issue, and crime in general rose. Lowell's reputation suffered tremendously.