Thanks for all the comments!
Yannis--thanks for the link to the station
Edsland--keen eye on the outhouse
Trestle--is the same track that serves the quarry, it is the mainline from Minneapolis to Duluth, Great Northern. I think it is the standard track that serves the quarry. I thought that it would be flat cars, however the photograph proves that box cars were used to transport the quarry at the time of the photo.
THERE is lots if information on the quarry operation available, one of the reasons I chose it to model. In fact, many of the foundations have been preserved, as the quarry was abandoned since the hardest sandstone played out and new sources elsewhere in the country as well as granite was substituted.
AS far as the engine house, I will attempt to duplicate the building accurately by casting walls with accurate window size and placement. It looks like the tin roof, which will be an easy model.