Supply and Planning

Where Does Our Water Come From?

Our raw water comes from the Colorado River through the Colorado-Big Thompson Project (C-BT), managed by the Northern Colorado Water Conservancy District or Northern Water. C-BT water is collected in western slope reservoirs and transported through the Alva B. Adams Tunnel to Mary’s Lake, Lake Estes, Pinewood and Flatiron Reservoirs and finally pumped to Carter Lake where it is conveyed to the Carter Lake Filter Plants for treatment. In addition, the District maintains supplemental and emergency connections with other water supply systems and can receive supplemental water in various parts of our service area. These connections provide emergency supplies and supplemental water to boost service in remote areas of the district. Visit for more information to the Northern Water system.

Water Rights Planning

Based on projected use and new customer growth within the system, the District plans for water supplies to provide:

  • Annual water needs from existing customers
  • Drought Protection: adequate water supply in the event of a prolonged (up to 5 years) drought.
  • The District acquires water from the C-BT project and local ditch companies. Multiple water sources provide the District redundancy in case of droughts, fires, or other infrastructure problems.