Boulder Reservoir

Boulder Reservoir, located on Boulder, CO's northeast side, supplies Colorado-Big Thompson Project water to the City of Boulder and farms and ranches in Weld and Boulder counties. The St. Vrain Supply and Boulder Feeder canals deliver C-BT Project from Carter Lake to Boulder Reservoir.

Boulder Reservoir has swim beaches with lifeguards, a boat launch and boat rentals. See the C- BT  Recreation - East Slope page for more information.

Boulder Reservoir
Boulder Reservoir

Boulder Gets 20 Percent of its Water from Reservoir Boulder Reservoir supplies the City of Boulder with approximately 20 percent of its water. The decision to build Boulder Reservoir was made 16 years after the formation of the Northern Colorado Water Conservancy District in 1937.
 
Northern Water Expands to Include BoulderInitially the City of Boulder excluded itself from Northern Water’s boundaries. However, post-World War II growth convinced city officials of the need for additional water.

In January 1953, after a feasibility study by Boulder and extensive discussions, the Northern Water Board of Directors expanded Northern Water’s boundaries to include Boulder.

Northern Water operates and maintains Boulder Reservoir and retains the right to one-third of its operating capacity. Boulder manages recreation at the reservoir.