Need help identifying this railroad tool

I found this while walking along a abandoned stretch of track in Western PA which was about 50 yards from an active RR line. The abandoned tracks are on a map from 1910 (oldest map of the area I found) as being active but in 1955 the map shows that the line is abandoned. The tool was broken in two when I found it and is stamped barely legibly "ALLE ? ? ? ? Y" which I guess is "ALLEGHENY" The tool has seen a lot of use and has no seams where it would be cast from a mold. I remember finding this tool very close to the surface next to a small pile of old bricks.

I'm wondering what this tool is for and how old it is?

Here is a link to a picture

http://imgur.com/a/YiTaB" onclick="window.open(this.href);return false;