Thanks guys. I have been looking for quite a while
One nifty source is HAER-HABS, Historic American Engineering Record-Historic American Building Survey:
http://memory.loc.gov/ammem/collections/habs_haer/
Search for coaling station or coaling dock or railroad coaling.
Since you are a Reading fan the HAER has full plans for the RDG-exP&R-exW&N roundhouse at Wilmington.
Tons of photos, plans, maps of all sorts of buildings and industries. From the late 1800's through today.
Dave H. Painted side goes up. My website : wnbranch.com
Where can I find plans or articles for scratch building a roundhouse or a concrete type coal dock.