 
		 
		 
		Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
 
		Centre Square Water Works, Latrobe Plans, 1799
 
		Fairmount and vicinity, 1839
 
		Centre Square Engine House, ca. 1807
 
		Electric Pump Installations at Lardner’s Point Pumping Station
 
		New Mill House at Fairmount
 
		Pennypack Sewage Treatment Works, 1914
