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In page Fresh Kills Landfill:

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Plant 1 was the administrative headquarters, and also the leading repair facility. Plant 1 and Plant 2 were for marine unload operations. Barges arrived from the other boroughs (primarily Manhattan and Brooklyn). Refuse was picked up by a crane (called a "digger") using a clamshell bucket and deposited in a caterpillar-tracked side-dump vehicle called an "Athey wagon" (not related to the equipment of the same name used for oil drilling).