Chris:
The Bloomingdale line is out of service though technically it is not abandoned except for very short sections on the far western and far eastern ends.
The far western end of the line is used for occasional car storage by CP Rail and Metra. The far eastern end, including the movable bridge over the Chicago River, is used by shortline Chicago Terminal to reach its trackage on Kingsbury Street.
For more on the Bloomingdale Line pick up the upcoming book \"The Milwaukee Road in Chicago\" which contains a well-researched and detailed chapter on this branch line written by Ted Pannoke. Copies are available at
www.mrha.com.
Tom