This was a traditional giant Western Washington Cottonwood.
One of the most dangerous trees to have within any living space, around your home or anywhere that pets or loved ones frequent. 
Known for dropping huge limbs and toppling completely over from minimal amounts of wind.

This is definitely not a removal job for just any climber.
Nobody less than a seasoned, confident professional.
The total backyard Drop Zone in this particular removal, definitely was not much space to work with. 
This was only 25 ft by 60 ft.