I don't know how to gauge rail weights, but from my guess, its the same as the rail that currently is on their existing track from North Anson south, since the section between Madison and North Anson has been unused for about 20 years and has finally been getting some traffic to the mill near the bridge.
The last time I hiked over this area a few years ago, the date stamped on it was 1922 (roughly from what I remember).
How much? Total length from the bridge to Fahi Pond Rd. is 3,325 ft., the two other siding tracks are 1,030 ft., and 936 ft. Then there's all that extra rail sitting in that little storage area in the east side of the yard.
I think there were two switches. Buried in the undergrowth.
Of course it can be recovered, if you have the proper equipment. Its been sitting out there untouched for 33 years.
I would assume that Guilford/Pan Am Railways still owns the ROW. I know very little about how property is dealt with once a company files with the ICC for abandonment.