[E. L. Moore's Elizabethton Water Tower; J. Collier collection]
Although I noted that this water tower could be used in the 1900-era shortline terminal diorama, it's very similar to the ones seen in photos of E. L. Moore's Elizabeth Valley RR.
A little squatter version with an octagonal roof can be seen in several published photos of the EVRR - notice the number and spacing of tank bands is different in the ones in the published photos. You can see a clear view of the non-business side in one of the black-and-white photos near the end of this post.
E. L. Moore wrote a number of water tower construction articles, but not about this one. His Burn those models that appeared in the May 1955 issue of Railroad Model Craftsman is the closest. There's a photo of the tank sans support frame, a discussion about how to engrave the roof shingling with a wood burning tool, and a clear photo of the finished model. I rather like the conical roof on this water tower in comparison to the one in the article and photos. It seems more refined, and the overall proportions of the completed tower look a little more graceful.