A chain of four lakes, collectively called the
Nanaimo Lakes, follow the river's course. Only First and Second Lake, though, are actually part of the river. Third Lake is connected via a short stream to Nanaimo River, just west of Second Lake. Fourth Lake is a man-made reservoir along Sadie Creek that is used to supply water for Harmac Pacific. Two other man-made lakes, Jump Lake and South Fork Reservoir, are operated by the city of Nanaimo and supply water to Nanaimo and the surrounding area. Other notable lakes in the watershed include Blackjack Lake, Quennell Lake, Michael Lake, Crystal Lake, Blind Lake, and Whisky Lake.
Jump Lake Dam Jump Lake Dam is an
earthen dam along the course of Jump Creek, which starts at Butler Peak and flows northward where it meets the South Nanaimo River at the same spot as east flowing Dunsmuir Creek. Jump Lake Dam was built in 1974 to create a stable source of drinking water for Nanaimo and area. It can hold of water, which is enough to supply every home in Nanaimo for a year. Water levels in Jump Lake are regulated so that downstream South Fork Reservoir remains at full supply level all the time and other reservoirs downstream have a constant supply of water.
South Fork Dam Farther down stream, along the South Nanaimo River, about where Whisky-jack Creek meets South Nanaimo River, is South Fork Reservoir. South Fork Reservoir was created in 1931 with the completion of South Fork Dam. The dam is wide and tall and is built of unreinforced concrete. The reservoir holds of water and it is kept full as Nanaimo's water delivery system is gravity fed. Two pipelines, one and the other in diameter, carry water downstream to Nanaimo, where there are additional holding reservoirs. The pipeline was built in 1954 and has a capacity of of water a day. The other pipeline was completed in 1993 and has a capacity of a day. In 2000, South Fork Dam was upgraded to produce
hydroelectricity for local uses. There are nine balancing reservoirs located throughout the city to meet peak domestic demand. The first balancing reservoir was built at Lost Lake in Nanaimo's north end in 1969. That was followed by reservoirs at College Park and Rutherford Road. During the 1980s, additional reservoirs were built at
Duke Point Industrial Park, Langara Drive, and Tanya Drive. More recently, another reservoir was added near
Extension in 2010 and in 2014 the open reservoir on Nanaimo Lakes Road was replaced by a new reservoir and energy recovery facility. == Parks and recreation ==