http://www.openstreetmap.org/?lat=40.74 ... 5&layers=M
I'll label the Hackensack River crossings A-F from north to south (A NJT Bergen County Line, B NJT Main Line, C now freight-only, D Northeast Corridor, E abandoned, F NJT Morris & Essex Lines).
Initially, before the Erie tunneled through Bergen Hill (1861), everything went south from Croxton and used the PRR's cut across Bergen Hill. The Paterson and Hudson River (Erie) was the first to build a line (ca. 1834) from Croxton south to the PRR at Marion, and most likely continued to own the land if not the trackage after 1861.
Original alignments before the DL&W built its own Bergen Hill tunnel (1876) were:
*DL&W main line: came through Newark and crossed at E, then curved into Erie tunnel
*DL&W Boonton Branch: crossed at B, curved south around the east side of NJTP exit 15X, then curved back east to merge with the main line west of the Erie's Northern Branch (
http://mapmaker.rutgers.edu/HUDSON_COUN ... /index.htm shows the old and new routes without all the pollution of present trackage)
*Erie main line: crossed at A, continued straight on the Nave-Croxton Running Track into the tunnel
*Erie Northern Branch: merged into the main line at Croxton
*Erie Newark Branch: came through northern Harrison and crossed at E, then curved into Erie tunnel (same route as DL&W main line on and east of bridge E)
*Montclair and Greenwood Lake (not yet Erie): crossed at C, then curved south into what's now the Northern Branch and used the PRR's cut
*New Jersey Midland (NYS&W predecessor): came south along the west side of Bergen Hill, just west of the Erie Northern Branch, and used the PRR's cut
After 1876:
*DL&W main line: crossed at F and entered their tunnel
*DL&W Boonton Branch: crossed at B and followed the present NJT route into the tunnel
*Erie main line: same
*Erie Northern Branch: same
*Erie Newark Branch: same until 1909 (per ICC valuation); afterwards used a new connection to C and curved around at Croxton, rejoining the old route just west of the Northern Branch
*Erie Greenwood Lake Branch: presumably the same until the Erie acquired control in 1878, but then it's not clear what it did until ca. 1890, when the Erie built the Arlington Railroad so Greenwood Lake trains could cross at E and follow the same route as the Newark Branch; then in 1909 they returned to C (same as the Newark Branch) - thus the crossing at C was not used between ca. 1890 and 1909
*NYS&W: appears to have continued to use the PRR's cut, even when controlled by the Erie
Both the 1909 Newark Branch realignment and the short storage track are labeled Branch A on the 1909 map, but only the latter is labeled so on the 1934 map.