The ship was built in 1885 by A. Leslie and Company, Newcastle, England, and was purchased by the United States Navy from the Miami Steamship Co. on 25 May 1898 for service in the Spanish–American War. However, reconditioning and conversion to a water distilling ship was not completed until after the end of active operations against Spain. Iris was commissioned at Norfolk Navy Yard on 1 August 1898, Lieutenant Arthur B. Connor USN in command.