Water Resources Strategic Master Plan

Your opinion matters!


We need your help in evaluating our "draft" 2016 Water Resources Strategic Master Plan

The Town of Castle Rock and surrounding communities have a limited supply of water and must acquire long-term water regardless of increased demand. To ensure we have water now and for the future, Castle Rock Water has had a Water Resources Strategic Master Plan in place since 2006. We are currently updating the third edition of this plan and are seeking input from our residents. 

We appreciate your input through this important survey for the Town of Castle Rock.  The input will be used to help Castle Rock Water appropriately plan for the future.  Your responses will be kept strictly confidential and will only be used in aggregate measuring our resident’s familiarity with and opinions regarding water in Castle Rock.

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2016 Water Resources Strategic Master Plan Summary


In 2006, the need to create a plan to secure long-term water supplies for our Town became a priority and Castle Rock Water developed a comprehensive plan to address it. At that time, the Town acquired all of our water from underground aquifers which are slowly being depleted. As it takes several lifetimes to replenish this water, Castle Rock Water began looking for renewable water supplies. Renewable water is a supply that is new each year, such as snowmelt and rainfall flowing into a creek. There are a variety of renewable sources, each with various considerations. The 2006 plan and subsequent updates address those sources and considerations. 


  • Continue to develop a water supply portfolio that consists of 75 percent renewable water sources and 25 percent non-renewable sources by 2050. After 2050, the Town could continue to develop renewable sources working towards a 100 percent renewable supply to complement the existing non-renewable supply.

  • Implement additional conservation measures to reduce the per capita demand to 100 gallons per person per day. This would account for an additional 18 percent savings in water use and would essentially act as a new source of supply. This water would represent approximately 2,700 acre feet of water annually. Using less water with additional conservation measures would require less water to be purchased in the future. (Currently, the Town uses approximately 7,000 acre-feet per year.).
  • Fully develop and utilize the Town’s renewable water rights. The Town currently has water rights which are not being fully used in the Cherry Creek and Plum Creek basins as well as additional sources.    
  • Fully utilize our reusable water. Certain sources of water the Town uses, such as from the Denver Basin aquifer, WISE supplies and future imported supplies can be reused repeatedly instead of being discharged for use downstream. Reused or recycled water is treated water that has been discharged from the wastewater treatment plant, captured and purified through the water purification plant, and then distributed to the customer for residential use. Usage of these supplies could represent a cost effective way to meet approximately 35 percent of our future projected water demand.

  • Continue to develop partnerships with regional entities to share in costs and resources, thus reducing the cost impact to our customers. The Town has been a member of the South Metro Water Supply Authority since 2004 which established the WISE water project. The eight-member Chatfield Reservoir Mitigation Company has been instrumental in expanding the water storage rights at Chatfield. Castle Rock Water has also formed partnerships with Dominion Water and Sanitation District, Parker Water and Sanitation District, Douglas County and others to develop key pieces of infrastructure and to cost-share in projects.  

  • Develop and maintain storage. A key component of purchasing renewable water is storing excess when not needed by our customers for future use. The plan outlines storage programs for reservoirs and aquifers. Current reservoir storage space includes Rueter-Hess Reservoir (8,000 AF) and Chatfield Reservoir (287 AF, expandable to 1,500 AF). Aquifer storage entails pumping renewable water into our underground aquifer within the Denver Basin (235 AF/yr).  
  • Continue to maintain, develop and protect the Town’s Denver Basin aquifer supply. This groundwater supply will help meet the demands of our customers in the short term and provide reliability and drought protection in the long term.

  • Work within a sustainable financial plan that generates capital funds required for the transition to a sustainable, renewable supply. This financial plan, updated in 2015, provides economic modeling with considerations for demand variations, debt configurations and project development. 

  • Manage water rates and fees.The proposed water supply strategy will take years to implement and require significant capital expenditures. Our long-term water resources program predicts that the Town will need to invest $317 million through 2050 to meet these goals. To achieve this, a rates and fees study is conducted annually to ensure that the rates and fees collected to cover these investments are adjusted accordingly.