[PRCo] an unknown Pittsburgh coal haulage trolley line?

[aprochek at aol.com]

I don't know if anyone will be able to make heads or tails out of the URLS below but I was perusing the historic pittsburgh image collections (first URL) and searched for Inclines and found a coal haulage incline between the MT Oliver and Knoxville inclines.  That is what the remaining monstrous URLs are supposed to point to.  The coal haulage doesn't appear to be from a direct mine shaft but fed from a narrow gauge rail line across the face of the hill (in one of the blow ups - the last URL - you can see a building with "Coal Yard" hand written on it).  I think its an electric line as there looks to be a lot of catenary poles above the tracks, but they are only about 5' high or so.  This is typical for mining operations but would seem deadly to me for open, accessible operation to the public.  Does anybody know anything about this?
Regards
Alex
 
http://images.library.pitt.edu/cgi-bin/i/image/image-idx?xc=1&page=index&g=imls
 
http://images.library.pitt.edu/cgi-bin/i/image/image-idx?sid=0f941ae113d37ceda62da9acad8930bf;type=boolean;xc=1;g=imls;view=thumbnail;start=41;q1=incline;rgn1=ic_all;size=20
 
http://images.library.pitt.edu/cgi-bin/i/image/image-idx?sid=0f941ae113d37ceda62da9acad8930bf;xc=1;g=imls;c=pghrail;q1=incline;rgn1=ic_all;evl=full-image;quality=2;view=entry;subview=detail;lasttype=boolean;cc=pghrail;entryid=x-7429.0027.pr;viewid=74290027.TIF;start=1;resnum=42
 
 
 
http://images.library.pitt.edu/cgi-bin/i/image/image-idx?sid=0f941ae113d37ceda62da9acad8930bf;xc=1;g=imls;c=pghrail;q1=incline;rgn1=ic_all;evl=full-image;quality=2;view=entry;subview=detail;lasttype=boolean;cc=pghrail;entryid=x-7429.0031.pr;viewid=74290031.TIF;start=1;resnum=46
 
 
 
 http://images.library.pitt.edu/cgi-bin/i/image/image-idx?sid=0f941ae113d37ceda62da9acad8930bf&xc=1&g=imls&c=pghrail&q1=incline&rgn1=ic_all&ox=901&oy=392&lastres=0&res=-1&width=750&height=592&maxw=3000&maxh=2368&subview=getsid&lasttype=boolean&view=entry&viewid=74290031.TIF&entryid=x-7429.0031.pr&cc=pghrail&quality=2&resnum=46&evl=full-image&image.x=218&image.y=301
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