In 1889 the Metropolitan Sewerage District was established, serving 18 greater Boston cities and towns. Over the next fifteen years, the agency built one of the finest regional sewerage systems in the country, although it still discharged the raw sewage into the ocean. By 1940 there were three points, on Nut, Deer, and Moon islands, for the discharge of raw sewage into the Atlantic Ocean. This sewage had contaminated the shellfish beds to the point that discussions of building treatment plants began. The Nut Island plant opened in 1951. The Deer Island plant opened in 1968, and the Moon Island plant was converted to standby, overflow, operation. The Metropolitan Sewerage District was reorganized into the MWRA, a larger agency, in 1985. Under the federal court order, MWRA completely rebuilt the treatment system between 1985 and 2000. Subsequently all sewage is treated and the effluent is discharged at the sea floor 9.5 miles (15.3 km) from shore. [Wikipedia.com]

#cambridgema #cambridgemassachusetts #cambridgeart #cambridgestreetart #manholecovers #manholes #manhole #manholecover #alcantarillas #alcantarilla #draincover #manholestagram #rust #rusticdecor #total_forging #manholesoftheworld #kumlokk #tombino #putdeksel #sewercover #industrialdesign #lookdown #mannloch #bueiro#gulli #egout #mwra