Резервуар Макмиллана: История водоснабжения Вашингтона, округ Колумбия.

The McMillan Reservoir is a reservoir in Washington, D. C., that supplies the majority of the city's municipal water. It was originally called the Howard University Reservoir or the Washington City Reservoir, and was completed in 1902 by the U. S. Army Corps of Engineers.

The Macmillan Reservoir was built in 1902 on the site of Smith Spring, one of the springs previously used for drinking water. Washington's earliest residents relied on natural springs but this came to be inadequate as the city's population grew. In 1850, Congress determined that the Potomac River should be the city's principal source of water.

In the early years of operation the water was routed through the system's two earlier built reservoirs, Dalecarlia and Georgetown, which were designed to settle sediment out of the water. In 1873 the Army began construction of a new water supply tunnel, led by Garrett Lydecker, a major in the Army Corps of Engineers. The tunnel was known as the Washington City Tunnel, to provide more storage, sedimentation and distribution capacity for the system. Lydecker predicted the tunnel would cost about $53,000 to build. Construction of the tunnel was halted in the 1880s due to a variety of problems including funding shortages, cost overruns, bribery and fraud associated with the construction process. Subsequent improvements to the city water system were initiated beginning in the 1920s. The regular use of chlorine as a disinfectant began in 1923 at the McMillan filtration plant. Another treatment plant was completed in 1928 adjacent to the Dalecarlia Reservoir using a newer technology, a rapid sand filter. After the war, the property remained closed to the public, but continued to supply the city with filtered water. The growth of the city population led to further expansions at the Dalecarlia site in the 1950s. The slow sand filtration system at MacMillan was replaced with a rapid sand filtration system, built adjacent to the old system, in 1985. In 1991, the McMillan Reservoir site was designated a DC Historic Landmark. In 2000, and again in 2005, it was placed on the "List of Most Endangered Properties." The semi solid residuals (sludge) produced by the treatment plant are processed at a residuals handling facility located at the Dalecarlia Reservoir. The residuals facility began operation in 2012.

The McMillan Fountain is a public artwork by American artist Herbert Adams located on the Reservoir grounds. The fountain, completed in 1912 and dedicated in October 1919, consists of a bronze The Three Graces placed upon a pink granite base. Cast by Roman Bronze Works, the fountain was originally part of a large landscape setting designed by Charles A. Platt. A tribute to James McMillan, the fountain was paid for by citizens of Michigan, who raised $25,000 by way of pennies, nickels and dimes donated by public school children. Congress also funded totaling $15,000 towards the completion.