Giant derelict structures of industry are part of what made me fall in love with the Seattle aesthetic – always sad to see parts of it go. 3 legacy cranes from Terminal 30 headed to scrap

Does anyone know when these were first operational or when they last operated? I’m guessing late 70s / early 80s and they definitely haven’t lifted anything in the last 15 years. I dont even think they used them to pull open the big Matson boat that sat at T30 for a few years…