Colorado's source of surface water, unlike groundwater, primarily comes from the ​west of the Continental Divide, primarily from snowmelt, it flows in rivers from the mountains down through the front range. This gives Colorado the consideration of a headwater state.  Our water comes from the rockies, and then flows out of state. Because our state provides water to many others, there are rules that limit how much we can use.  For example, the Colorado Division of Water Resources has set up laws  as to how much rainwater a single family resident can collect. ​One interesting project from The Colorado Water Conservation Board is the Chatfield Reservoir Reallocation Project.  This aims to address the issue of growing water demand along the front range without sacrificing the water rights from agriculture.  The reservoir has the capacity for 20,000 acre feet more of water storage for urban and municipal use. Denver primarily gets their water from the South Platte River, Blue River, Williams Fork River and Fraser River watersheds.  They also use water from South Boulder Creek, Ralston Creek, and Bear River watersheds.