Dual Irrigation System

About the Dual Irrigation System

In order to fully utilize every water resource available to them, the District has constructed a dual water supply. All new developments in the northern part of the District have two water systems: a potable system for indoor use and a separate non-potable system for use in underground irrigation systems.

The dual system is one of Colorado’s largest, and it includes separate irrigation and potable water systems that provide water for about 33,000 households and businesses. The irrigation system includes its own set of alluvial wells and completely separate infrastructure from the potable drinking water supply system. Each system includes separate pipelines, pump stations, and reservoirs used to deliver the different supplies. The dual system allows the District to maximize their water rights and ultimately supply more homes efficiently.

Using the System

It will take several years for the District to acquire all of the irrigation supplies and complete construction of all of the infrastructure requirements. In the interim, portions of the irrigation system will utilize water originating from the potable system. However, it is important to understand that the entire separate irrigation system is a non-potable system, not for drinking.

Customers served by the District's dual irrigation system will need to maintain their system's components including the Pressure Vacuum Breaker (PVB) assembly installed on the irrigation system. A link to the Operation and Maintenance Manual showing the PVB assembly is provided here

Building supply stores may carry some replacement parts if your system is in need of repairs. Some commercial suppliers in the area are also open to the public and carry replacement parts and repair kits. Two area suppliers are Denver Brass & Copper Co (303.295.1777 or http://dbcirrigation.com), and Ewing Irrigation (303.288.2088 or http://www.ewing1.com/).


Spring Start-up Instructions

The District irrigation season begins the week of April 15th. Property owners will be able to access irrigation water to their separate irrigation system by completing the following instructions:

  • Follow the Startup Instructions to turn your system on, and be sure to turn it off each winter.

  • Check for broken sprinkler heads and irrigation system pipes that are broken and causing puddling in the lawn.  Turn your system off at the “stop and waste” valve until the leaks are repaired.

  • Adjust sprinklers for head-to-head coverage, and make sure they are spraying on landscaped areas, not streets or sidewalks.   

  • Adjust your time clock to irrigate your lawn appropriately for each zone, no more than three times a week.

  • If you hire a professional to provide irrigation start-up and shut-down services, be sure they are knowledgeable about the separate irrigation system and familiar with the District’s Rules and Regulations.


View a PDF of the 
"Separate Irrigation System Spring Startup Instructions" or you may view a Video that was developed for shutting down your system in the fall, but it may help you identify each device in your system and give you a better understanding of how the system works.

Irrigation Controllers
Did you know that about half your water consumed in a year is water used outdoors? We know that scheduling your residential Irrigation Controller can be confusing. Please check the links below that will help you with setting up your controller.

Hunder X-Core Timer Programming 
https://www.youtube.com/watch?v=_PRtho7XiSA

Rain Bird SST Smart Sprinkler Timer Programming 
https://www.youtube.com/watch?v=a9Mp0z3B1dA