This project required Wildstone to modify the existing 10' dia. x 140' tall Primary Economizer Exhaust Stack. This project required the use of a 120 ton hydraulic crane to assist in removing the top 18' from this existing stack. The top stack section was removed and modified to accept a new flange, damper installation and exteriors walk-around catwalk and handrail assembly. The top stack section was then reinstalled and commissioned.