Cactus
As an architect and designer, I am fascinated by Utica's industrial history and, in particular, the relationship of rails (railroad and trolley) and city form. So am very eager to see your book if/when its published.
My grandfather grew up on Potter Street (he was born 1907) and imagine that he knew the O+W + DLW pretty well. Grandmother lived in Paris NY not far from Lincoln Davies and took the train frequently (daily) to either Waterville, Sauquoit or Utica . Unfortunately both have passed and that source of history is gone.
As far as your question regards DLW and Trolley interface, don't have much to offer. Can't answer the question about the station. I do know that the trolley's carried express but don't know if there was a formal interface established. Have you done much research of state records ? I've been reviewing some of the documents of New York State Senate and they cover a wide variety of issues:
https://books.google.com/books?id=b54lA ... ca&f=false