Dock Creek Sewer in 1849: A report on its condition made to City Councils
Drainage and Sewerage Report, 1853
Two reports on the state of the Schuylkill River, 1867
Filling valleys and other lowlands, cutting down high ground, piping streams into sewers, filling marshland, dredging and damming streams and rivers, and any other activities or infrastructure designed to alter the original topography of the city to more readily accommodate real estate development.