Most of the roadbed of the P&SB is visible on aerial photographs, given a certain amount of imagination and knowledge of the intended route. It comes up through West Danby on the west side of the valley, just where the gorge becomes really steep on that side, and curves across Gulf Road around the 1100 foot contour. North of Vanbuskirk Gulf, it's pretty clear on aerial photos, running at about the 1120-1130 foot contour. It cuts across Adams Rd. and seems to run roughly parallel to Shaffer Rd. as it approaches Newfield. The route through Newfield seems to have been obliterated by development, but you can start to pick it up on photos again skirting the east edge of the swamp at the source of Fish Kill, to the west of Protts Hill. It crosses Horton Rd., and cut-and-fill is visible on topo maps on both sides of Millard Hill Rd. (I think someone's picture of the cut to the south is online.) It looks as if it runs northeast from there, then swings northwest on the west side of Stonehouse Road, going up to 327 just below Bostwick Corners. There's what looks like a bit of fill just below 327 there, and the curve of 327 is probably built on the roadbed, as it matches up with extensive filling to the north of Bostwick Corners, as well. It runs north parallel to 327 through Enfield and Millers Corners, swinging a little wide to cross Fivemile Creek, then parallels the upper reaches of Enfield Creek and crosses the divide into the Taughannock watershed. It follows that (nameless?) stream for a while and then swings away eastward at about the junction of Van Liew and Podunk Rds., running NNE to cross Cold Spring Rd. where it makes its curve. You can see a bit of filling there, also the oddly-shaped boundary of Taughannock State Park where it includes the ROW. On the north side of Trumansburg Creek, you can see a bit of fill forming the 910 ft. contour line. It seems to be running at about 920 ft. when it appears again as a treeline south of Covert, paralleling the LV. Beyond this, it's pretty hard to pick up on aerial photographs, but it's visible again just south of Starrett Corners running northwest and crossing Sheldrake Creek where Pete said. The pipeline seems to have been located consistently to the west of the grade, and not on it, wherever it is visible.