An antique original engineer drawing showing the Blackwells Island Bridge in the city of New York. The detailed drawing features a section and elevation at piers, signed and dated to 1903. The drawing provides a glimpse into the engineering challenges of building one of New York Citys most iconic bridges. The Blackwells Island Bridge, now known as the Queensboro Bridge, was completed in 1909 and is a vital part of the citys transportation infrastructure. Antique Engineer Drawings And American City Planning History Collectibles.