Blog, coast, coastal flooding, flooding, sea levelSea-level rise will wash away $46.4 million worth of Portland’s Commercial Street properties by 2100, architects say — Business — Bangor Daily News — BDN Maine 25 Oct 2013 ihaigh Sea-level rise will wash away $46.4 million worth of Portland’s Commercial Street properties by 2100, architects say — Business — Bangor Daily News — BDN Maine.