There were a great deal of internal improvements and urban modernizations during Swann's tenure as mayor. The long-time colonial-era various in-fighting problems and competitive volunteer independent firefighting companies since 1763 (under a loose confederation of the "Baltimore City United Fire Department" of 1835) were replaced in 1858 with paid professional firefighters with the organization of the modern current Baltimore City Fire Department, and were given steam-powered fire engines and a better emergency telegraph alarm system. His office also oversaw the creation of the horse-drawn streetcar system in Baltimore replacing the older omnibuses, the purchase from the Col. Nicholas Rogers estate and creation of the large tract for Druid Hill Park in 1860, overlooking the west banks of the Jones Falls. Following the municipal purchase of the former private Baltimore Water Company, (since 1804), saw the replacement of its old wooden pipes and aging inadequate infrastructure with the beginnings of two water-sewage construction projects along the upper Jones Falls. Following was the major public works project of the construction of the dam at the new Lake Roland Reservoir along with the organization of a new city water board and extension of new waterworks service into new outlying areas of the growing metropolis. The "Basin" (Baltimore Inner Harbor) was dredged at 20 feet depth during his term as governor, and several new schools were added to the city. The former constables and "City Night Watch" system from 1784 were replaced by a newly organized Baltimore City Police Department under then modern principles was established and given new uniforms, weapons and training (later placed under supervision and appointment powers of the governor in 1860 to the 1990s). To provide better street lighting, the offices of Superindendents of Lamps with the then existing gas system was created.