Here is a link for some Aquifer storage info. Water Information
Aquifer storage will be an important part of the water supply puzzle.
It eliminates Evaporation loss, and does not require new reservoirs,
but it does require significant power, for water quality, and pumping. and other infrastructure.
Just because Highlands Ranch does not currently use west slope water, does not mean that community is a responsible water user. Groundwater depletion in the South Metro area and the unsustainability of this water supply is one of the main reasons we are faced with additional water projects.
On the other Hand, Agriculture currently uses about 85% of the water consumed in the South Platte basin. SO its not all about our lawns...It might be about your Dinner.
Food For Thought