I told him that with the assistance of 1 other party member (all of which are willign to help) he could carry the axe. He is refusing assistance and being stubborn about wanting to carry it alone.
Remember this isn't just "a pole", this is more like a metal reinforce telephone pole, with a 10' wide slab of forged steel at the end. The slab is probably close to 1-2 feet thick. I don't have a converter for the math on just the weight of steel at that size, but I think my 400 pound estimate was actually a little low. Esp. considering that an engine block (on a v8) weights over 400 pounds and use far less metal than the head of that axe would. Now add in the weight of a telephone pole (which is at least the 400 pounds by itself) and it is getting into heavy range. I think I need to refigure the math on the items weight.
Also, maybe swamp is too nice of a word. The dwarf is currently located on Orthrys (first layer of Carceri) in the swampland surrounding the River Styx. Roughly, 1 mile from the river itself. Also, the party has no transportations spells (teleport, plane shift, etc).