Plan of Pine Street Sewer, 1830
Bridge Street Draw, Cofferdam, ca. 1896
Finished Upper Roxborough filters, 1903
Allegheny Avenue Sewer at Pier 126, 1918
Includes activities to maintain the healthfulness of the city, and the animals (such as pigs) and diseases (such as cholera, yellow fever, and typhoid fever) that were the objects of public health efforts.