I mage from Nancy Seasholes’ Gaining Ground showing extent of landfill in Boston, compared to sea level rise projection from the City of Boston’s Climate Ready Boston Map Explorer.
Note, the Back Bay (the filled area on the south side of the Charles River) is expected to be spared the flooding of harbor-side neighborhoods like South Bay or the South Boston waterfront because the Charles River dam and locks can protect the land along the river from flooding.
Links to images and the history of the Charles River
Links to images and information about the Blue Hills