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• Pr°ft Testing Protocol for Determining <br /> Streambed Characteristics of the South Platte River <br /> 1.0 Introduction <br /> Two Aquifer Performance Tests (APTs) are planned for the South Platte River. The goal of <br /> these tests is to determine streambed characteristics of the South Platte River. These <br /> streambed characteristics will be used to better estimate stream depletions caused by recharge <br /> well pumping. The APT consists of the following: <br /> • Installation of 4 monitoring wells at each site <br /> • Pumping of the subject well for a minimum of 10 hours to a maximum of seven days. <br /> • Monitoring of groundwater elevations during pumping and recovery <br /> • Monitoring of stream elevations and flow during pumping and recovery <br /> A detailed explanation of the APT is provided in the following sections. <br /> 2.0 Layout <br /> Currently envisioned are tests at existing recharge well locations that are approximately 100 feet <br /> from the river and located west upstream and east downstream of CDOW Tamarack Ranch <br /> State Wildlife Area. The west well would be the Stieb Land Co. recharge well R -4 (Permit <br /> • 58771 -F, SE SE Sec 20, Twn 9N, Rge 51W) of the Lower Logan Well Users Inc. augmentation <br /> plan 03CW208. The east well would be the Dinsdale recharge well No. 1 (Permits 50035 -F / <br /> 30513, NW SW Sec 2, Twn 10N, Rge 48W) of the Dinsdale augmentation plan applications <br /> 03CW194 / 01 CW061. <br /> For both locations two monitoring wells will be installed between the pumping well and the <br /> South Platte River. These wells will be placed so that they line up perpendicular to the South <br /> Platte River. A third well will be drilled in line with the other two, but 180 on the other side of <br /> the pumping well. In addition, a well will be installed near the opposite river bank. See <br /> schematic layout in Figure 1. <br /> 100' 0 Pumping <br /> Well <br /> O • O i S O <br /> �► O Monitoring <br /> r50' =50' Well <br /> Not to Scale <br /> River <br /> Figure 1: Schematic Well location Layout <br /> • <br /> Page 1 of 3 <br />