![Mill Creek Sewer under construction. Several men standing beside a giant partially constructed sewer pipe.](https://waterhistoryphl.org/wp-content/uploads/Mill-Creek-Sewer_20040920079_300dpi.jpg?w=300)
![Mill Creek Sewer under construction. Several men standing beside a giant partially constructed sewer pipe.](https://waterhistoryphl.org/wp-content/uploads/Mill-Creek-Sewer_20040920079_300dpi.jpg?w=300)
![Black-and-white photo of a trolley car atop debris with several workmen around and atop it](https://waterhistoryphl.org/wp-content/uploads/Wingohocking-Ash-Cars-Cox-p77b.jpg?w=300)
Car 5615, later P-16 and the second D-31, Brill, 1911, Curtis C-1112 trucks
![State Street pipeline construction](https://waterhistoryphl.org/wp-content/uploads/D.3ab_FINAL_1986.002.1496-97.jpg?w=300)
State Street pipeline construction, 1904
![Belmont Filters construction 1903](https://waterhistoryphl.org/wp-content/uploads/D.2_FINAL_1986.002.1075-scaled.jpg?w=300)
Belmont Filters construction, 1903
![Upper Roxborough filter beds](https://waterhistoryphl.org/wp-content/uploads/D.1a_FINAL_1986.002.0660-61-62-1.jpg?w=300)
Upper Roxborough filter beds under construction, July 1902
![Devereaux Street Sewer on the cover of Philadelphia magazine, 1911](https://waterhistoryphl.org/wp-content/uploads/DR_June1911.jpg?w=300)
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