Construction of the Second Avenue Subway Line Between 2nd Street and St. Mark's Place: Second Avenue Subway One in a series of images documenting construction of the Second Avenue Subway Line in lower Manhattan between 2nd Street and St. Mark's Place. Images show various stages of construction, excavation, laborers, pipes being re-routed, cranes, construction signage, Manhattan Bridge Plaza, construction materials including tools, beams, and bull dozers. NOTE: It is likely that these were all photographed by Arnold Krockman. Other negatives with these exact images, with contact sheets stamped by Krockman, were cataloged in 2015. -- Jodi S.