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Feasibility of the Town of Hillrose Augmentation Project Project Sponsor The Town of Hillrose (Hillrose) is a small municipality located in Northeast Colorado. Hillrose currently has 112 customers (taps) on the drinking water system with the current potential of an additional 33 taps. The water for Hillrose is supplied by one tributary groundwater well. The well can pump between 26 and 55 acre-feet of water annually. 55 AF corresponds to the annual diversion for Hillrose without any water restrictions in place and 26 AF corresponds to an annual diversion if Hillrose does impose water restrictions. The well was formerly augmented under Groundwater Appropriators of the South Platte (GASP) and is currently augmented under the Lower Platte and Beaver (LP&B) plan of operation. See Appendix A for the 2002 GASP record. Project Service Area The service area of Hillrose is located in Morgan County about 5 miles northeast of Brush. Hillrose is located primarily in the SW1/4 of Section 10, Township 4 North, Range 55 West. A general location map of the project service area is found in Appendix B. Need for the Project Hillrose uses their one junior well to supply all of the water required for the town. The depletions from the pumping of well must be replaced during times when there is a "call" on the river by a senior downstream water right. There are numerous downstream ditches and reservoirs which all have senior water rights to the Hillrose well. Some of these rights are close to 50 years senior to the well. LP&B and GASP have successfully been used for the past 30 years to cover the depletions on these wells. However, if the current drought continues curtailment under the LP&B augmentation plan may be possible. Hillrose needs to develop its own source of augmentation in order to protect the well from this possible curtailment. Feasibility Study Hillrose Aug Project June 2004 1