Baltimore starts construction for a system of sewerage, officially, on October 22, 1906, with a groundbreaking by Mayor Clay Timanus at Ensor and Lanvale streets. Behind Greenmount Cemetery.

As was typical for the times, a plaque was created and placed on the cemetery wall

In the 1906 Annual Report of the Sewerage Commission are listed some interesting facts about Baltimore:

The population, according to a police census was 555,000. The city being 31-1/2 square miles consists of, approximately, the following buildings:

Asylums, Homes and Hospitals; Jail, Penitentiary and House of Refuge 77. Apartment Houses 26. Banks and Libraries 47. Breweries and Distilleries 21. Car Barns and Railroad Stations 45. Churches and Missions 364. Coal, Wood, Stone and Lumber Yards (Sheds) 130. Clubs and Office Buildings 57. Department Stores 10. Engine Houses and Police Stations 46. Hotels 32. Livery Stables 55. Industrial Plants 266. Manufacturing Plants 367. Markets 10. Residences 108,340 (of which, 15,000 dumped household waste directly into the Jones Falls/harbor). Schools, public and private; Colleges, Convents 169. Stables, small 1461. Theatres and Halls 38.

Total 111,561