The industries and trackage as best I can recollect in the non-electric portion of LIRR Montauk branch Western Suffolk County, NY 

Babylon
	MU electric coach yard
	car wash facility on main line (in use? :-)

Bay Shore 
	Bay Shore Lumber closed - south side trailing point switch eastbound 	1 track abandoned in the last few years.
  ---------------------------------
  ------------------------/--------  East ->
     --------------------/
	xxxLumber

Islip Westbound
	Bayslip Plumbing Supply - north siding, back freight loading door 	visible. Siding abandoned since sixties and torn up with new 		station platform restorations in 90's

	84 Lumber (built late 60's early 70's)
	 - 1980's occasional bulkhead flat car load, mostly plug door Thrall 	type lumber cars. 1990's occasional car spotted east across Grant Ave 	(could be off line industry or LCL unloading?)

	Grinnell Lithograph good sized plant north of tracks 100 yards. May 	have received freight from siding as there was a path through wooded 	area.

	Eastbound
	Islip Coal & Feed - large coal bunker demolished in late 60s. Used on 	site very small loco to spot and pull cars into fenced in coal yard. 	Siding went down another 1/2 mile west into a junk yard area, but 	never saw a freight spot. 

		xxxxxxxxxxxxx Grinnell Plant
 					xx84 lumber  I I       Bayslip
 				/--------------------I I----  -  -  -  -  -
    ---------------------------/---------------------I I--------------------
    -------------------------------------------------I I---------/----------
	     ------------------\---------------------I I--------/	
         xxx junk		\-------------       Grant Ave
				   xxx Islip Coal                  East -->

	East Islip, Great River, Oakdale - no sidings/industry

	Sayville
	siding (2?) eastbound storage of old hoppers, a caboose, pile of 	cinder, rail and ties, etc.  Favorite of vandals, no fence. Siding 	pulled in 90's. 

Any and all additions/corrections always appreciated. Pictures of above to follow on net. Will advise.