 
		 
		 
		Down Under!
 
		Mill Creek Sewer under construction, 1883
 
		Fairmount Water Works, W.H. Bartlett, 1839
 
		Centre Square Engine House, ca. 1807
 
		Wood truss drawbridge, Orthodox Street over Frankford Creek, 1899 [Detail]
 
		Bridge Street, intermediate pier, ca. 1896 [Detail]
 
		Bridge Street Draw, intermediate pier, ca. 1896 [detail]
 
		Bridge Street Draw, intermediate pier, ca. 1896
 
		Bridge Street Draw, construction of piers, ca. 1896
 
		Bridge Street Draw, Cofferdam, ca 1896 [Detail]
