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<br />Town of Castle Rock <br />Water Conservation Plan <br /> <br />Section 2 <br />Executive Summary <br /> <br />(1) Currently the Town of Castle Rock is supplied by ground water, approximately 20% <br />shallow alluvial water and 80% deep non-tributary water. Of the wells under the <br />control of the Town, seven alluvial wells and eighteen deep wells are used to supply <br />over 2,300 acre feet of water annually. <br /> <br />(2) The deep ground water comes from the Dawson, Denver, and Arapahoe aquifers of <br />the Denver Basin. If all of the deep wells owned or under the control of the Town <br />were drilled and connected to the treatment and distribution system, the aggregate <br />yield might be about 7,000 acre feet per year, <br /> <br />(3) The Town owns nine surface water rights that were originally used on East and West <br />Plum Creeks. These rights have been transferred to allow use of the water through <br />alluvial well pumping. Through its augmentation plans, the Town has the ability <br />during the summer months to pump alluvial water on East Plum Creek and then to <br />return, at least partially, the consumptive use through the West Plum Creek ditch <br />rights. Construction of a West Plum Creek alluvial well field is planned to make <br />further use of West Plum Creek water rights through alluvial well pumping. <br /> <br />(4) The Town makes use of lawn irrigation return flows, receiving credit for water that <br />is used for landscape irrigation which percolates back through soil to return to the <br />alluvium in certain areas of the Town. <br /> <br />(5) Reuse is a long considered concept for Castle Rock. In 1982 through the first <br />Utilities Master Plan, wastewater was considered a valuable source of water and <br />should be completely "reused" within the community ("total reuse concept"). Some <br />residential areas of Town were equipped with dual piping, potable and reuse for each <br />household. The 1987 Utilities Master Plan Update modified the concept of reuse for <br />use in large non-residential irrigation areas such as parks, streetscapes and golf <br />courses. <br /> <br />(6) The Town is a member of the Plum Creek Wastewater Authority. In 1990, all flows <br />were diverted from the Castle Rock Wastewater Treatment Plant to the new <br />wastewater treatment facility. Therefore, there will be no local wastewater treatment <br />until capacity requires the re-opening of the PCWA Plant #2, the old Castle Rock <br />plant. <br /> <br />) <br /> <br />5 <br />