Silverton Water Tank.

Hello everyone,
Amongst other towns on my On30 RGS/D&RGW layout, I will model Silverton. I would like to do a model of the original Water tank that I believe was at Silverton. I found a report in the last couple of days searching, that said it was a little way out of town.I didn't record where I saw that, and can't find it again.
I haven't been able to find anything else about it. Does anyone have any accurate information about this tank. I would like to know what sort of roof it had (octagonal or round), when it was built, when it was removed, and where it stood, as well as anything else that may be useful to help model it.
A photo of it would be great, but I think I am being pretty optimistic to hope there might be a photo out there that I haven't been able to find, or even find reference to.
I will keep my fingers crossed that someone can help in some way.
Regards,
RGS Goose.