I cant think of a Day since i started working with trees that i havent learned something new. Either an easier way of climbing, rigging, moving around the crown , or sometimes just something about trees i havent noticed before. For me the last signifacant thing isnt really about climbing and i havent learned it and figured it out yet. Its aboue a 60 foot 26 inch DBH Red Mapple that i removed. The power Co prunned it away from the wires. Doesent look like they did to bad of a job or took too much off of the tree and killed it. However with in the last 3 years its had some root dammage on one corner of its root system where they put in a new fire hydrant . i would have thought the tree would have enough roots though even after that to survive however it did not. Maybe its a combination of the root dammage and the somewhat heavy prunning on the one side that have killed it. The lady who owns the tree said that City guys came over a couple times a year and did something down in the storm drain near there. Could there be holes in the system with roots comming through and rather then fixing the problem ie *the hole * itself the workers are prunning the so called invasive root system of the tree? or worse yet feeding the tree something they shouldent be thats killing it ? I dont know if thats just an off the wall thought or if it could really happen . i should have taken pics of this tree to show you guys before removing it , didnt think of it at the time though .