Andy, the DL&W mainline typically ran south of the Erie mainline between Chemung and Bingo. West of Bingo, it crossed the Erie mainline (near Lowman) and was north of the Erie all the way from there to Buffalo. There no surviving semaphores on any ex-EL tracks west of Johnson City. Several were still active on the ex-Erie in the Canisteo valley well into the '90s, even after CR single-tracked the line, but thry're gone now.
Also, here's a site that gives you a look at the remnants ofthe DL&W near Waverly:
http://www.trainweb.org/gggrs/DLW_south_waverly.html
It was thru this site that I was introduced to the excellent Web pages of Scotty Chaos. I also recommend an interesting book called
Trackside Around Sayre, which I got at the RIT train show last month. It includes some great pics of DL&W/Erie/EL action in the Waverly-Elmira area so one can really get a feel for it was like back in the '40s-'76. It also has a simple map of the area...