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Dike 4 at a Glance History: Began operating in 1994 as a History of Groundwater Management in the East Valley Groundwater successful pilot facility; currently being expanded into a full-scale facility and When the Coachella Valley Water District was formed in 1918, the lower portion of Recharge expected to be complete by early 2009 the Whitewater River Groundwater Subbasin Location: In (roughly Washington Street to the Salton Sea) La Quinta, near was already starting to experience overdraft Avenue 62, due to a large demand by agricultural users. south of Lake CVWD has worked diligently since its formation Cahuilla to eliminate the overdraft. Size: 39 CVWD constructed the Coachella branch of recharge basins the All-American Canal to bring an alternative on 165 acres source of water to farmers in 1949, which Cost: $40 million (estimated) allowed groundwater levels to recover until the building boom of the early 1980s. Recharge capability: 40,000 acre-feet per year as a full-scale facility From 1988-1992, CVWD conducted several subsurface investigations to determine the most favorable sites for groundwater recharge in the lower portion of the basin. In 1994, the Dike 4 pilot facility went into Martinez Canyon at a Glance operation at the base of the Santa Rosa Mountains. It quickly proved to be a successful History: Began operating in 2005 as a location for recharge of the lower portion of pilot facility; If successful, long-term plans the Whitewater River Groundwater Subbasin. call for it to be expanded into a full-scale facility in approximately 2014 Location: Near COACHELLA VALLEY Avenue 72, WATER DISTRICT south of Valerie .O. P Box 1058 Jean Coachella, California 92236 Size: 8 recharge in the basins on 20 acres as a pilot Telephone: (760) 398-2651 Fax: (760) 398-3711 East Valley facility; not yet determined as a full-scale Email: firstname.lastname@example.org facility Website: www.cvwd.org (Published in 2008) Cost: $63 million (estimated) Recharge capability: 4,000 acre-feet per year as a pilot facility; 40,000 acre-feet per year as a full-scale facility Why AQUIFER RESERVOIR we recharge... LA QUINTA LA QUINTA CITY HALL The Coachella Valley is blessed with a 40 ft above Sea Level natural groundwater basin. When Native DIKE 4 RECHARGE FACILITY Americans were the only inhabitants, the 5-84 ft above Sea Level INDIO INDIO CITY HALL aquifer was so full you need only to dig a 15 ft below Sea Level shallow hole to find flowing water. N Today, our aquifer is in a state of overdraft, ELL IAN W meaning more water is used each year ARTES than can be replaced by natural or artificial means. Natural recharge occurs when precipitation atop local mountains seeps, or percolates, into the ground. Recharge Benefits Everyone The sand LE The physics of groundwater recharge explain SCA and gravel create T TO how Dike 4 benefits the entire subbasin, M AP NO natural filtration for the not just areas down valley or with a lower water and help contribute to our elevation. drinking water’s nearly pristine quality. Dike 4 is located at the base of the mountain Artificial recharge occurs at CVWD’s four range at an elevation slightly higher than recharge facilities, two of which directly the nearby cities of La Quinta, Indio and benefit the lower portion of the Whitewater Sand, Gravel and Water make Coachella. Imagine the lower portion of the River Groundwater Subbasin. Water is up the Aquifer Whitewater River Groundwater Subbasin as imported from the Coachella Canal to Some people imagine the aquifer as an an air mattress. Now, imagine the air mattress large man-made ponds that are carefully underground lake, but it’s more like a laying on a surface that dips in the middle positioned for effective percolation below bathtub filled and is on a slight incline. If you use a hose the clay layer of ancient Lake Cahuilla. with sand, gravel to slowly fill the mattress with water, the The expansion of these facilities, combined and water in the portion at the lowest elevation will fill up first. with other water management efforts, are small spaces in- However, the pressure will eventually force helping CVWD meet its goal of eliminating between. the water outward and fill the entire mattress. overdraft of the aquifer. Imagine the mattress is full and you poke a hole anywhere on the top surface. The pressure would force water out of the www.cvwd.org hole, like the flowing artesian wells of the valley’s past.
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