What I learned is that a portion of the landfill is being "capped" or sealed off. The tarps, which block rainwater from getting into the full garbage "cells," will be covered with a layer of soil, and then grass and other plants with shallow roots will be planted. Underground pipes collect the methane gas that the decomposing garbage produces.
There is a lot more information online about the capping process for those who are curious, including a 700-page document, dense with legalese, that was prepared for the SECCRA project bidders.
I drive by the landfill frequently and am always amazed at how talented those heavy equipment operators are, piloting their giant machines along the landfill's terraces and steep slopes.
|This is the part of the SECCRA landfill that is being capped.|