Work continued on the intercepting sewers into the 1960s. In new areas of the City, separate sewers were built, carrying stormwater and sewage in separate pipes. The photograph below shows the last gasp of the original Schuylkill Interceptor, which since the 1880s had diverted sewage from the Schuylkill River above the Fairmount Dam and dumped it, untreated, below the dam. On December 20, 1956, the sewer's flow was diverted into a new interceptor that carried the wastes to the Southwest Sewage Treatment Plant.