Water Resources Strategic Master Plan

Accomplishments and proposed projects: the 2021-2026 update

A major reason Castle Rock Water is efficient and successful is because of extensive planning. The Water Resources Strategic Master Plan is one of the department's primary plans to ensure a strong water future for our community. Originally developed in 2006, after the impact of a major drought had leaders thinking about the future, the plan has been updated over the years. In 2021, an open house and an online survey were available for customer input. Almost 400 responded and your comments were heard. Most noted were the many suggestions for additional conservation measures, many of which are currently part of our plan. These comments confirm customer's support of how Castle Rock Water is strategizing for the future. 

Updated 2021 Water Resources Strategic Master Plan (PDF)

Learn more about the Water Resources Strategic Master Plan

Castle Rock Water has made amazing progress, advancing on the overarching goal of achieving 75% renewable water by 2050 and 100% by 2065. Click on the tab to find a synopsis of those accomplishments and the anticipated plan for the next five years.

PC Diversion Pump Station
WISE pipeline
Well Rig at night
  1.  Groundwater
  2. Local Sources
  3. Reuse Water

Protecting non-renewable groundwater

The deep underground aquifers still account for a primary source of supply for Castle Rock (as well as most South Metro communities). This source is non-renewable, is slowly being mined out and takes generations to recharge. It must be used efficiently and protected as a long term drought supply.


  • Within the past five years, Castle Rock Water built four more deep groundwater wells to ensure access to this supply.
  • A meticulous deep groundwater well rehabilitation program has been funded and put in place to increase yields, ensure efficiencies and prolong the life of these wells.


  • Continue a regular and robust well rehabilitation and maintenance program.
  • Identify timeline and funding for repair and replacement of existing Denver Basin and alluvial wells.
  • Improve and expand the Bell Mountain water treatment plant to serve Bell Mountain, Crystal Valley, Ridge Estates and other potential Castle Rock Water customers.
  1. Import Water
  2. Storage
  3. Conservation

Import renewable water resources

Though importing water from other areas may initially be an expensive option for Castle Rock, maximizing opportunities for imported water is one way to diversify our supply. This water is also fully reusable once it has been imported, making is a surprisingly cost effective option.   


  • Partnered with other South Metro communities to build the infrastructure to import Water Infrastructure Supply Efficiency, or WISE water, from Aurora’s Prairie Waters. 
  • Castle Rock currently subscribes up to 2,000 AF per year from WISE water (about 20 to 25% of our total annual water use today.)
  • Purchased about 1,500 AF of water rights in the Lost Creek Basin in Weld County.


  • Fully utilize our 2,000 AF WISE subscription.
  • Identify a minimum of 230 AF of additional renewable water for purchase to support the Box Elder Project.  
  • Add to and enlarge pipelines in Parker to better accommodate larger volumes of imported WISE and future Box Elder water.
  • Prepare Box Elder water rights for use in six to 10 years.

Plan to pay

The need to diversify renewable supplies and build accommodating infrastructure is a matter of sustainability for future generations. Though it is projected the Town may require as much as 19,100 AF of water at buildout, from the currently used 15,300 AF, the renewable water infrastructure projects are needed despite population. The benefit of having additional customers, however, is that the cost for these projects is spread out. Castle Rock Water is funded solely from customer rates and fees and not from taxes or the Town’s general fund.

The updated 2021-2026 plan has a major impact on budget as the plan will identify key capital improvement projects, policies and programs to reach our renewable water goals. Currently, the five-year budget includes $89.2 million for the proposed long term renewable water projects. 

To ensure financial resources to fund the plan, Castle Rock Water plans to continue to conduct annual rates and fees studies to ensure financial viability. Currently, rates and fees are below predictive models and are expected to continue to rise at a slow rate. Castle Rock Water also benchmarks rates and fees with other Front Range water providers and remains mid-range in comparison.

Learn more

All of the plans Castle Rock Water follows, including those for securing water resources, water use considerations, irrigation and regulations measures, stormwater infrastructure and operational guidelines, can be found at CRgov.com/WaterPlans. The public is also invited to attend the monthly Water Commission meetings.