"without the slightest accident" despite the engineering complexities of the project. The renovation was completed by 1921; that year, the Downtown League gave 1 Broadway a "best-altered building" award. The structure initially contained the booking office and New York City headquarters of the IMM. The ground floor had the first-and-second-class booking offices, waiting room, and lobby, while the basement contained the steerage booking office and storage rooms. The second floor housed the IMM's construction department; the third and fourth floor, general offices; and the fifth floor, a board room and executive offices. Other tenants rented out the seven upper floors. The IMM competed with the Cunard Line, which had erected its own nearby building in a similar way two years before. The Cunard, Bowling Green, and International Mercantile Marine Company buildings and several others on the southernmost section on Broadway, formed a "steamship row". Later use Both the public and the federal government's United States Shipping Board started to distrust IMM following World War I: the public eschewed the company due to its usage of British ships, while the Shipping Board saw IMM as too large and anti-competitive. This led to a series of organizational changes, including the sale of all foreign-flag lines and even some domestic lines. The IMM merged with the Roosevelt Steamship Company in 1931 to form the Roosevelt International Mercantile Marine Company (RIMM), which continued to own 1 Broadway. The same year, RIMM acquired United States Lines (USL) and began merging its other operations under that name. By 1940, RIMM itself had merged into USL, and the next year, an USL subsidiary acquired 1 Broadway. USL was also one of the largest shipping lines of its time, but faced numerous financial problems after World War II. Accordingly, the company placed 1 Broadway for sale in the late 1960s or early 1970s. USL's then-owner Walter Kidde & Company reportedly "nearly sold" 1 Broadway in 1972, but USL withdrew the building from sale due to a decline in New York City's real estate prices. USL also proposed replacing 1 Broadway with a 50-story skyscraper in 1970, which would have entailed taking air rights from the nearby Alexander Hamilton U.S. Custom House. Shipping entrepreneur Malcom McLean bought USL in 1977, and the following December, United States Lines announced that it would move to Cranford, New Jersey. The relocation took place in mid-1979, though USL remained on the ground floor