I recently came into a large amount of coal... 3, 10' long dump trailer loads. It came out of a basement in Boston. I have a insert in my living room fireplace that will burn coal or wood. It was designed primarily for coal. There is some large lumps but the majority is very small. I can get some pictures if it helps. My question is does it go bad so to speak? Will moisture hurt it? Right now I have a large pile of it in my back yard. I am trying to figure out what to do with it from there, if its still good. Maybe put a bunch in trash barrels with lids. If it is bad I am just going to use it as fill and bury it. What do you guys think? I primarily burn wood but this might be something to save for Future use. Didn't know where else to put this.