Edmunds,
Have you taken a look at MR's The Model Railroader's Guide to Locomotive Servicing Terminals by Marty McGuirk (Kalmbach Publishing)?
I found it very helpful and chock full of pictures and ideas on the different types of fueling facilities. Should be readily available at your LHS.
While poking around to get a picture of the above reference, I just discovered another one that I wasn't familiar with: Steam Locomotive Coaling Stations and Diesel Locomotive Fueling Facilities by Thomas Dixon Jr.
Edmunds, sorry I don't have any personal experience with the latter reference. Here's a link that may be insightful:
http://www.amazon.com/Locomotive-Coaling-Stations-Fueling-Facilities/dp/1883089778
Hope that helps...
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
Edmunds in Latvia http://www.edmundsworld.net HO Transition Era modular layout being built with Faller Car System, DCCar, German Style Signalling, Computer Control and Automation