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5 expanded. The District Includes all of Englewood and Littleton and more than half of Denver, While only a small portion of the City of Aurora lies within the District it diverts all of Its surface water supply from the reach of the South Platte Basin administered within District 8. The cities of the area obtain their water supplies from ground and surfac~ water sources which Include the South Platte River, the Colorado Rlvel' and its tributaries and from ather west slope streams. .' The major water user In the area Is the City of Denver, which Is presently serving a population of almost 700,000, both within and beyond the city limits. Early settlers of the Denver area obtained water from the South Platte River and Its tributaries and from Individual wells. In 1872 an Investor-owned company was formed to supply water to a population of approxi- mately 5,000 people. This, and other private companies which had come Into being, were consolidated by the organization of the Denver Union Water Company in 1894, In existence for 24 years the company further developed the South Platte River as a primary source of water and completed Cheeseman Dam and Reservoir in 1904. The Denver Union Water Company was purchased by the City and County of Denver in 1918 and placed under the control of a Board of Water Commissioners. The Water Board continued development of the South Platte River source and completed the construction of Eleven Mile Canyon Dam in 1932, In 1936 West Slope water was diverted from the Fraser River, Vasquez Creek, and Jim Creek through the Moffat Tunnel, and delivered to Denver via South Boulder Creek and the South Boulder diversion system. These facilities known as the Moffat Collection System were subsequently extended to include diversions from Ranch Creek and St. Louis Creek. Regulatory storage was provided for this water by completion of Ralston Reservoir on Ralston Creek in 1938 and Gross Reservoir on South Boulder Creek In 1955. 10- Control of the Williams Fork Dam, Williams Fork Collection System, and Jones Pass Tunnel originally constructed by a governmental unit of the City of Denver was assumed by the Denver Water Board in 1955. Upon completion of the Vasquez Tunnel in 1959 water from the headwaters of the Williams Fork River was diverted into the Moffat System. The Williams Fork Reservoir stores water which Is used for exchange'. ,A power plant was added during' the period: 1956 to-1959' to provide add i t i ona I wa ter tor exchange and rep I-acemen t power. Cons t ruc t I on of the Harold D. Roberts Tunnel, started in 1946, was completed in 1962. 1964 saw the completion of Dillon Dam and the initial diversions of water from the Blue River System through the Roberts Tunnel to the South Platte River, Water derived from the Fraser River'--, Hoffat Tunnel System is treated at the Moffat Rapid Sand Filter Plant, having a present capacity of 150 million gallons per day and a future capacity of 190 million gallons per day. The Ralston Reservoir serves as a forebay for this plant. Blue River water conveyed through the Roberts Tunnel and then through the South Platte River is treated by the Marston Treatment Plant or the Kassler Plant prior to distribution in the Denver system, ,j The city of Aurora which formerly had two separate systems, one of which waS served by the Denver Water Board, now is receiving water from Its share of the Homestake Project which has been constructed through a joint effort of Aurora and Colorado Springs, The project includes the 225 foot high rockfill Homestake Dam located on the middle fork of Homestake Creek in Eagle County on the west slope which forms a reservoir having a design capacity of 45,000 acre-feet, Water Is delivered from Homestake Reservoir to the 5.5 mile 10-foot diameter