Big Dig excavation soil transformed Boston Harbor's toxic dump into green park
Boston's Big Dig infrastructure project generated over 16 million cubic yards of excavated soil, with nearly a quarter redirected to Spectacle Island in Boston Harbor. The island had previously served as a city landfill, where decomposing waste produced methane gas that triggered underground fires. The massive volume of soil was used to cap the old landfill and reshape the island's terrain. This formed the foundation of a long-term ecological restoration effort that successfully reintroduced trees, plants, birds, and other wildlife to the island.
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