Yarder is one of 2 Thunderbird TT-90's built from the ground up; Ross-built 4-axle carrier and tower with TY-90 hoist.
Machine was sold new to Hopkes Logging of Tillamook Oregon in February of 1986, and had been purchased by Nygaard
Logging of Warrenton Oregon by the time I took these pictures in 2005 near Jewell, Oregon.