In 1940, Portland's African-American population was approximately 2,000 and largely consisted of railroad employees and their families. During the war-time Liberty Ship construction boom, the need for workers drew many blacks to the city. The new influx of blacks settled in specific neighborhoods, such as the Albina district and Vanport. The May 1948 flood which destroyed Vanport eliminated the only integrated neighborhood, and an influx of blacks into the northeast quadrant of the city continued. Portland's longshoremen racial mix was described as being "lily-white" in the 1960s, when the local International Longshore and Warehouse Union declined to represent grain handlers since some were black.